FARMVILLE, Va. -- Mike Pence and Tim Kaine might lack the charisma and notoriety of their celebrity superiors on the Republican and Democratic tickets but their vice presidential debate Tuesday is suddenly taking on genuine political significance.
Pence faces a daunting high-pressure assignment in the televised clash that begins at 9 pm ET: stop the bleeding in Donald Trump's campaign in a way that the GOP nominee has repeatedly failed to do himself over the past week.
For Kaine, the vice presidential debate in Farmville, Virginia, offers a precious prime-time chance to skewer Trump over a string of controversies unleashed by the GOP nominee's poor debate showing last week. The Virginia senator can also road test fresh attacks that Hillary Clinton can use in the second presidential debate on Sunday, which will be moderated by CNN's Anderson Cooper.
The vice presidential debate initially looked like it might be a low wattage event between two conventional, fifty-something low-key politicians who most Americans would struggle to name. But the event is taking on a sense of urgency after a turbulent week in which Trump veered off message and took a beating in the polls. It will be up to Pence to help the campaign rebound.
Pressure on Pence
"There is a certain amount of pressure on Pence to right the ship because Clinton was overwhelmingly viewed as winning the first debate and Trump performed poorly and he has had a poor week ever since," said Joel Goldstein, a professor of law at Saint Louis University, who is a specialist on the vice presidency.
Both men, vying to be a heartbeat away from the presidency, will seek to introduce themselves to viewers mostly unaware of their own successful, yet under-the-radar political careers.
The GOP vice presidential pick is already signaling he will try to launch a counter-attack, trying to turn the campaign back into a referendum on Democrat Hillary Clinton after a week of damaging scrutiny of Trump.
"Hillary's record on foreign affairs alone could literally take up the entire 90 minutes and it wouldn't be pretty," Pence told a rally in Virginia on Monday.
Pence has a chance to lay out the kind of prosecution of Clinton's liabilities -- including some aspects of her record as secretary of state, her private email server and status as a pseudo incumbent faced with an electorate that wants change -- that Trump failed to pull off at his own debate last week.
The Trump campaign badly needs him to succeed.
The GOP nominee's own disappointing debate performance, and erratic off message behavior since, could be turning the race for the White House against him. Clinton has now pulled out a clear lead in most national polls released after the debate, reversing Trump's momentum. And the former secretary of state has also restored a strong position in swing state polls, just five weeks before election day.
Kaine probably has the easier task ahead of him on Tuesday night.
He is certain to try to force Pence on the defensive over reports that Trump may not have paid income tax for 18 years after declaring a $916 million business loss in 1995, revealed in a blockbuster New York Times story.
He will also likely try to frustrate Pence's efforts to move the campaign to sounder political ground by raising Trump's tirades over against former Miss Universe Alicia Machado, who says she was insulted by the GOP nominee during his time as a beauty pageant impresario.
Kaine may also try to probe the sharp differences on political philosophy between Pence and Trump -- on issues ranging from trade to Trump's birtherism crusade to foreign policy -- that make the Indiana's governor's position on the GOP ticket a balancing act.
The current vice president, Joe Biden, offered some pointers to Kaine in an interview with CNN's "New Day" on Tuesday.
"I don't know that he really thinks a lot of what Trump is saying makes any sense," Biden said.
"What a hell of a way to make a living, to be vice president and have to get up every morning and support someone you don't agree with," Biden continued. "Maybe he does. And if he does agree with him, then people can see the difference in policy here."
Biden on Trump: 'He's not a bad man, but his ignorance is so profound'
Still, a strong performance by Pence could allay concerns that the Clinton campaign has been playing up about whether Trump has the temperament and knowledge to serve as commander-in-chief.
Both Pence and Kaine have been preparing carefully for the debate.
The Virginia senator will be on home turf on Tuesday night and has been huddling with top members of the campaign team who prepared Clinton for her debate with Trump last week, including Democratic debate gurus Ron Klain and Karen Dunn. Kaine has consumed background material and gamed out approaches to lay out the stark difference between the two tickets, a campaign adviser said.
Unlike Trump, who disappointed aides with his debate prep, Pence has been getting ready for the debate ever since he was picked for the Republican ticket in July. He's been helped by Wisconsin Gov. Scott Walker and an aide said he was "more than ready" to answer attacks on the GOP nominee over his taxes.
One of Pence's main tasks will be to show he could add stability to Trump's inner circle if the unpredictable billionaire is elected President.
"The Republicans need to show there (will be) some adult supervision in the West Wing," said Goldstein, adding that Pence is an important surrogate for Trump, since the GOP nominee lacks the blue chip core of senior party figures like President Barack Obama, Biden, and First Lady Michelle Obama that the Clinton campaign can field on her behalf.
Pence, a well regarded figure among the Republican Party's most conservative constituencies, could also help Trump by reassuring traditional GOP voters that they will have an ally and an advocate in the White House. The Republicans would rather the debate turn on a contrast between Pence and Kaine rather than Clinton and Trump.
"When Tim Kaine was governor, taxes went up, unemployment went up. When Mike Pence was governor in Indiana, taxes have gone down. I think you're going to see a huge contrast in their records and a huge contrast in the tone," Republican National Committee Chairman Sean Spicer told CNN's "New Day."
Kaine, meanwhile, could help bolster Clinton's lead in his own state of Virginia and appeal to African-American and Hispanic communities that could be crucial in some battleground states. Both he and Pence, a former congressman, are well-versed in foreign policy, should the debate turn that way.
In terms of style, Kaine and Pence both provide sharp contrasts with their superiors on the ticket, both of whom are controversial, outspoken and polarizing figures who have lived in fame's glaring spotlight for decades.
Civil, courteous candidates
Both are known as civil, courteous men despite their strong political beliefs. They are also devoutly religious. Kaine is a practicing Roman Catholic and Pence a Catholic who is now an evangelical Christian. Pence used to say in his days as a conservative talk radio host in courtly Indiana that he was like a decaf version of Rush Limbaugh.
So if there is ever going be a substantive, in-depth debate about the differences between the policies Clinton and Trump are advocating, the vice presidential debate may be the mostly likely venue for it to occur.
Typically, vice presidential debates lack the huge stakes, massive television audiences and capacity to shape races seen in debates between the two party nominees.
But they are sometimes significant. In 2012, for example Biden steadied a nervous Obama re-election campaign with a strong performance in the vice presidential debate that set the tone for the President's own comeback following a poor first debate showdown against Mitt Romney.
And in 2008, Republican vice presidential nominee Sarah Palin staved off a widely predicted disaster and did just enough to remain a credible vice presidential pick --- though the campaign was later overtaken by the financial crisis.
A new CNN/ORC poll Tuesday showed that Pence and Kaine are equally matched.
A equal block of 38% of voters expect each man to do the best job. Both candidates have positive net favorability ratings but almost 3 in 10 of voters have no opinion of either man.
CNN's Tom LoBianco, Jim Acosta and Betsey Klein contributed to this report