WASHINGTON (AP) -- As the Supreme Court considered two landmark cases on gay marriage this week, the flood of activity across the street in the Capitol was not lost on Chief Justice John Roberts.
"As far as I can tell, political leaders are falling all over themselves to endorse your side of the case," Roberts told lawyers urging the court to rule that married gay couples should receive federal benefits.
Roberts was hardly exaggerating. In the span of two weeks, seven senators have announced support for gay marriage, despite representing moderate or Republican-leaning states where such a move long has been considered a major political risk. One by one they fell like dominos, declaring on Facebook or quietly issuing a statement to say that they, too, now support gay marriage.
Taken together, their proclamations reflected a profound change in the American political calculus: For the first time, elected officials from traditionally conservative states are starting to feel it's safer to back same-sex marriage than to be among the last to join the cause.
For some Democrats, like Missouri Sen. Claire McCaskill and Montana Sen. Jon Tester, the reversal would have been almost unfathomable just a few months ago as they fought for re-election. The potential risks were even greater for other Democrats like North Carolina Sen. Kay Hagan and Alaska Sen. Mark Begich, already top GOP targets when they face voters next year in states that President Barack Obama lost in November. It was less than a year ago that voters in Hagan's state approved a ban on gay marriage.
Those four Democrats and two others -- Mark Warner of Virginia and Jay Rockefeller of West Virginia -- were swept up in a shifting tide that began to take shape last year, when Obama, in the heat of his re-election campaign, became the first sitting president to endorse gay marriage. Former Secretary of State Hillary Rodham Clinton, a potential contender in the next presidential election, followed suit in mid-March.
As support among party leaders builds, rank-and-file Democrats appear wary of being perceived as hold-outs in what both parties are increasingly describing as a civil-rights issue.
"They're reflecting what they're seeing in the polls -- except the most extreme of the Republican base," former New Jersey Gov. Christine Todd Whitman, a Republican who supports gay marriage, said in an interview. "From a purely political perspective, if you want to be a leader of the future, you look at the next generation. They are overwhelmingly in favor of this."
Reince Priebus, the national chairman of the Republican Party, cautioned in a USA Today interview that the GOP should not "act like Old Testament heretics."
Among Republicans, whose party platform opposes gay marriage, the shift in position has mostly been limited to former lawmakers and prominent strategists. Still, a distinct change in tone was palpable this month when Ohio Sen. Rob Portman, a whom presidential candidate Mitt Romney vetted last year as a potential running mate, declared his support, citing a personal conversion stemming from his son coming out to him as gay.
Rather than blast Portman for flouting party dogma or failing an ideological litmus test, Republican leaders shrugged, indicating that even if Republicans, as a party, aren't prepared to back gay marriage, they won't hold it against those in their ranks who do.
In the Republican-controlled House, where most members come from districts heavily skewed to one party or the other, GOP leaders are not wavering publicly from their staunch opposition. When the Obama administration stopped defending in court the Defense of Marriage Act, which bars legally married gay couples from receiving federal benefits, it was House Republicans who took up the mantle. Democrats said Thursday that Republicans have spent as much as $3 million in taxpayer funds to defend the law, now being challenged at the Supreme Court.
"It's like immigration. The party realizes they are on the losing side of some of these issues," said former Rep. Jim Kolbe, an Arizona Republican. Kolbe came out as gay in 1996 while in office and will mark another milestone in May when he and his longtime partner marry in Washington.
"They want to make the shift, but you have got to do it in a politic and strategic way," Kolbe said. "It's a matter of how and when you take down one flag and run up the other."
Kolbe and Whitman joined dozens of other prominent Republicans in signing a friend-of-the-court brief urging the Supreme Court to strike down the law barring federal recognition of gay marriages. But with House Speaker John Boehner, R-Ohio, still defending the law and social conservative groups vowing payback for those who abandon it, prospects are slim that Congress will move any time soon to repeal it on its own.