It’s a long time ago, but it is worth remembering that conservative avatar Goldwater was in his day an outspoken supporter of women’s reproductive freedom — a freethinker who voted his conscience over the protests of Catholic bishops and all others who tried to claim these matters as questions of conscientious liberty and not sensible social policy. With Goldwater on his side, Obama sees a clear opening for skeptics wary of the extremism that has captured Republican hopefuls in thrall to the fundamentalist base that controls the GOP presidential primary today. Holding firm on family planning — even if it means taking on the Catholic hierarchy and other naysayers by offering a technical fix that would have insurers cover costs instead of the churches themselves — is a calculated political strategy by the Obama campaign, not a blunder as it has been characterized by many high powered pundits, including progressives like Mark Shields of PBS and E.J. Dionne of the Washington Post.

Recent public opinion polling on the subject is worth reconsidering. For years, it has been perfectly clear that a substantial majority of Americans see the value of expanding access to contraception and reliable sex education as essential tools to prevent unwanted pregnancy and abortion and to help women balance the competing demands of work and family. But unlike a zealous minority on the other side, these moderates have not necessarily privileged these social concerns over important questions of economics or national security that mattered more to them at election time.

That’s what seems to be changing. With his now-famous “nope, zero” response last spring, President Obama simply shut down Republicans in Congress who wanted to defund family planning as part of a deal to reduce the federal deficit. The action elicited a sudden surge in his popularity, especially in the highly contested demographic of women voters between the ages of 30 and 49 who voted for him in 2008 but wound up frustrated by failed promises and disappointing economic policies. Campaign polling has since uncovered a big opening for Obama with this group because they are furious over Republican social extremism. An astonishing 80 percent of them disapproved of congressional efforts to defund Planned Parenthood last spring. Polling among Catholics in response to last week’s controversy shows identical patterns, with 57 percent overall supporting the Obama “compromise” to ensure full coverage of contraception, according to reporting by Joe Conason in The National Memo, and cross-tabs demonstrating much higher margins of support from Catholic women, Latinos, and independent Catholic voters — all prime Obama election targets.

If the numbers are so persuasive, why then have Republican conservatives strayed so far from the greater tolerance of the Goldwater age? Why have they allowed the family planning issue to tie their candidates up in knots in 2012? The answer is in just how outsized the influence of a minority viewpoint can be on a political party, so long as it represents the base of that party’s support.

A bit of history going all the way back to Franklin Roosevelt’s New Deal is instructive. Back then, birth control was still illegal in this country, still defined as obscene under federal statutes that remained as a legacy of the Victorian era, even though many states had reformed local laws and were allowing physicians to prescribe contraception to married women with broadly defined “medical” reasons to plan and space their childbearing.

The movement’s pioneer, Margaret Sanger, went to Washington during the Great Depression, anticipating that Franklin Roosevelt, whose wife Eleanor was her friend and neighbor in New York, would address the problem and incorporate a public subsidy of contraception for poor women into the safety net the New Deal was constructing. What Sanger failed to anticipate, however, was the force of the opposition this idea would continue to generate from the coalition of religious conservatives, including urban Catholics and rural fundamentalist Protestants who held Roosevelt Democrats captive, much as they have today captured the GOP. It was Catholic priests, and not the still slightly scandalous friend of the First Lady, who wound up having tea at the Roosevelt White House.

The U.S. government would not overcome moral and religious objections until the Supreme Court protected contraceptive use under the privacy doctrine created in 1965 under Griswold v. Connecticut. That freed President Lyndon Johnson to incorporate family planning programs into the country’s international development programs and into anti-poverty efforts at home. As a Democrat still especially dependent on Catholic votes, however, Johnson only agreed to act once he had the strong bipartisan support of his arch rival Barry Goldwater’s endorsement and also the intense loyalty and deft maneuvering of Republican moderates like Robert Packwood of Oregon in the Senate. Packwood, in turn, worked alongside Ohio’s Robert Taft, Jr. in the House and a newcomer from Texas by the name of George H. W. Bush. Bush would remain a staunch advocate of reproductive freedom for women until political considerations during the 1980 presidential elections, when he was on the ticket with Ronald Reagan, accounted for one of the most dramatic and cynical public policy reversals in modern American politics.

Reagan had supported California’s liberal policies on contraception and abortion as governor, and Bush as Richard Nixon’s Ambassador to the United Nations had helped shape the UN’s population programs. But Republican operatives in 1980 saw a potential fissure in the traditional New Deal coalition among Catholics uncomfortable with the new legitimacy given to abortion after Roe v. Wade and white southern Christians being lured away from the Democrats around the issue of affirmative action and other racial preferences. Opposition to abortion instantly became a GOP litmus test, and both presidential hopefuls officially changed stripes.

Fast forward to 1992 and the election of Bill Clinton as America’s first pro-choice president, coupled with the Supreme Court’s crafting of a compromise decision in Planned Parenthood v. Casey that put some limits on access to abortion but essentially preserved the core privacy doctrine of Roe v. Wade. The perceived double threat of these political and judicial developments unleashed a new and even more powerful conservative backlash that took aim not only at abortion, but at contraception and sex education as well.

Exploiting inevitable tensions in the wake of profound social and economic changes occurring across the country as the result of altered gender roles and expectations — changes symbolized and made all the more palpable by Hillary Clinton’s activist role as First Lady — conservatives, with the support of powerful right-wing foundations and think tanks, poured millions of dollars into research and propaganda promoting family values and demonizing reproductive freedom, including emotional television ads that ran for years on major media outlets. A relentless stigmatizing of abortion, along with campaigns of intimidation and outright violence against Planned Parenthood and other providers, had a chilling effect on politicians generally shy of social controversy. And Bill Clinton’s vulnerability to charges of sexual misconduct left his administration and his party all the more defensive.

Since the welfare reform legislation of 1996, aptly labeled a “Personal Responsibility Act,” not only has access to abortion been curtailed, but funds for family planning programs at home and abroad have been capped. Hundreds of millions of dollars have been allocated to the teaching of sexual abstinence, rather than more comprehensive approaches to sex education. Just as tragically, U.S. programs addressing the crisis of HIV/AIDS — admirably expanded during the presidency of George W. Bush — were nonetheless made to counsel abstinence and oppose the use of condoms and other safe sex strategies, leaving women and young people all the more vulnerable to the ravages of the epidemic.

Empirically grounded studies over and over again undermined the efficacy of these approaches, which also flew in the face of mainstream American viewpoints and basic common sense. With Barack Obama’s election they have largely been revoked, enflaming the conservative base that put them in place and has lived off the salaries supported by government funding for faith-based social policy.

Even more disheartening to conservative true believers is the promise that the Affordable Care Act will vastly expand access to contraception by providing insurance coverage for oral contraceptives. This guarantee, endorsed by all mainstream health advocates, also includes emergency contraception, popularly known as the morning-after pill, that holds the promise of further reducing unwanted pregnancy and abortion and was meant to offer common ground in an abortion debate long defined by a clash of absolutes. The strong dose of ordinary hormones in emergency contraception act primarily by preventing fertilization, just like daily contraceptive pills, but in rare instances may also disable a fertilized egg from implanting by weakening the uterine lining that it needs for sustenance, causing opponents to vilify it as an abortifacient.

Supporting the Obama policy changes, on the other hand, is a new generation of progressive activists in reproductive health and rights organizations, energized by the intensity of the assaults against them, and now well-armed to educate and activate their own supporters by using traditional grassroots strategies and more sophisticated social networking. No institution has been more important in this effort than Planned Parenthood, with its vast networks of affiliates and supporters in every state, millions more supporters online, and a powerful national political and advocacy operation based in Washington D.C. that has been put to use to great effect in recent months.

The strength of the Planned Parenthood brand, coupled with the organization’s demonstrated ability to rally hundreds of thousands of supporters when it is attacked, has helped overcome traditional political reticence on reproductive justice issues. The Planned Parenthood Action Fund is already out with a strong new appeal warning politicians that women are watching. “Enough is enough. Back off on birth control,” is the new advocacy mantra.

Mindful of the numbers — and with the added ballast of what now amounts to a daily drumbeat of progressive television talk and comedy that delights in pillorying Republican prudery — Democrats are intensifying their resolve to take on this fight. Two things we can be sure of: Whoever emerges from the bloodbath of the GOP contest will try and backtrack from the birth control extremism of the primary. And Obama supporters, backed up by the advocacy community, will in turn stand ready to pounce on this inevitable flip-flopping.

Both sides may well summon the spirit and words of Barry Goldwater, who cautioned against allowing faith-based extremism to gain control of the Republican Party. “Politics and governing demand compromise,” he told John Dean, who reports on the conversation in his 2006 book, “Conservatives Without Conscience.” “But these Christians believe they are acting in the name of God, so they can’t and won’t compromise. I know. I’ve tried to deal with them.”