Running for president means spending a lot of time convincing the public that you really want the job. Not so if you're seeking the No. 2 spot.
The road to the vice presidency, history shows, is paved with feigned disinterest.
"If you're going to be vice president, you're going to be in the president's shadow," says Jody Baumgartner, a political science professor at East Carolina University. "If you appear to be seeking the vice presidency, drawing attention to yourself, that's not really a quality that a presidential candidate is looking for."