Mike Pence has long described himself as a "Christian, a conservative and a Republican in that order."
Now, the GOP vice presidential nominee and his priorities are facing a critical test as Donald Trump, staggered by his recorded vulgarities about women, careens toward Sunday's presidential debate against Democrat Hillary Clinton.
Mr. Trump has vowed to stay in the race.
Governor Pence's advocacy for Trump came to a screeching, perhaps temporary, halt Saturday in the hours after Trump released a video apologizing for 2005 remarks in which he describes his aggressive conduct toward women.
Pence said in a statement that he won't "condone his remarks and cannot defend them."
"We pray for his family and look forward to the opportunity he has to show what is in his heart when he goes before the nation tomorrow night," the Indiana governor said.
It's more evidence of the trials facing the GOP's No. 2 that could serve Pence well if he runs for the top spot in 2020, as the The Christian Science Monitor's Husna Haq reported earlier this week.
Pence managed to make a two-pronged case for himself for 2020, adds Seth Masket, a professor of political science at the University of Denver.
"First, he effectively distanced himself from Trump without rebuking him. That is, he basically said Trump is a good man and denied any evidence to the contrary. Second, Pence sounded traditional conservative stances on abortion and other social issues, giving Christian conservatives the sort of cultural appeals that have been lacking from Trump," explains Professor Masket.
Pence dare not speak about the possibility of a 2020 campaign. To do so would assume Clinton prevails on Nov. 8.
But plenty of people are engaging in presidential talk about Pence, including Republican member of Congress, former presidential candidates and more.
Sens. Mike Lee of Utah and Mike Crapo of Idaho are calling on Trump to quit the campaign so Pence can lead the ticket. Sen. Kelly Ayotte of New Hampshire says she'll write in Pence's name on the ballot — not Trump's.
Pence canceled his appearance at a Wisconsin rally Saturday with House Speaker Paul Ryan. Pence would have been expected to advocate for Trump.
"I'm sure he's horrified," said Mike Murphy, an Indiana public relations strategist who's known Pence for more than two decades. "We impeached Bill Clinton and we cannot impeach Trump off the ballot. But I wish there was a mechanism to do so."
Pence raised his political stock Monday night during the only vice presidential debate, when he squared off against Sen. Tim Kaine of Virginia, the Democratic vice presidential nominee. During the 90-minute event, Pence managed to not defend Trump's indefensible behavior, yet still sound supportive and show off his own expertise on foreign policy.
As the Monitor's Linda Feldmann wrote after the debate:
Pence faced a barrage of incoming from Senator Kaine, and in many cases, declined to defend Trump. That, in fact, may have been the smart strategy. Otherwise, Pence might have spent the entire debate playing defense, responding to accusations about Trump’s taxes, admiration for Russian President Vladimir Putin, demeaning comments about women, and birtherism.
Instead, Pence deflected and ignored much of Kaine’s assault. When Kaine asked Pence why he wasn’t defending Trump, Pence replied, “I’m happy to defend him” – and then continued to not defend him on many of the points.
The performance highlighted the gulf in political sophistication between Trump and his running mate.
Pence addressed the awkwardness with a savvy statement acknowledging his own performance and preserving his alliance with Trump.
"People are saying that I won the debate," he said Wednesday in Harrisonburg, Virginia. "From where I sat, Donald Trump's vision to make America great won the debate."
But on Friday, Trump's behavior put Pence to an even tougher test.
The Washington Post and NBC broke the story of Trump's words about women as Pence advocated for Trump him in Ohio.
"With Donald Trump as president, we'll have a president of the United States who respects all the American people," Pence said as news of Trump's comments was breaking.
Pence went on to defend, as he has previously, Trump's outspoken nature as a refusal to "tiptoe around those thousands of rules of political correctness."
Pence ignored shouted questions about Trump, and he was quickly whisked out of reach of the news media.
What followed: Pence's silence, the scrapping his Wisconsin appearance and finally, his statement.
An influential Indiana conservative, Jim Bopp, who helped draft this year's Republican Party platform, said Pence "should stay the course."
Trump's words are "ill-considered and crude," Bopp said, and also "statements Mike Pence would never make."
The election is bigger than that, said Bopp, a lawyer from Terre Haute, Indiana.
"In the grand scheme of things, this is trivia vs. real life-and-death problems that we face in our foreign policy and the serious challenges that everyday Americans face because of the Obama-Clinton economy."
Associated Press writers Brian Slodysko and Bill Barrow contributed to this report.