Battle of the Ages • It's youth vs. experience. At 42, Ryan is the same age as Biden's younger son. Ryan suggests the generational divide gives him an edge over 69-year-old Biden and wider appeal. But Biden's an energetic performer who prides himself on an ability to connect with regular folks.
Number's Game • Expect to hear lots about the House Republican budget plan written by Ryan. Biden's sure to criticize Ryan's spending cuts and Medicare proposal as too extreme. Even GOP presidential nominee Mitt Romney has distanced himself from some of Ryan's more controversial ideas.
The Moderator • Jim Lehrer's laid-back approach in the first presidential debate was widely panned. This time Martha Raddatz of ABC News runs the show. Look for her to ask sharper questions and more aggressively rein in the candidates. The veteran war correspondent has joked that it might be wise to wear body armor for the job. Obama on VP debate: 'Joe just needs to be Joe'
President Barack Obama has offered his take on the debate between Vice President Joe Biden and Congressman Paul Ryan, saying "Joe just needs to be Joe."
Obama offered his remark to in an interview with ABC News on the eve of Thursday night's vice presidential debate.
Biden has been a controversial figure, occasionally prone to making rhetorical gaffes. Obama himself came under withering criticism for his lackluster performance in last week's debate against Republican challenger Mitt Romney.
Biden, who served Delaware in the U.S. Senate for several terms before becoming vice president, got into a rough patch recently when he told a campaign audience in Charlotte, N.C., that the middle-class in America has been "buried" the last four years the same time frame of Obama's first term as president.