New York Magazine's John Heilemann says Barack Obama has a VP conundrum.

U.S. News and World Report's Liz Halloran writes that in choosing his running mate John McCain can't underestimate the age factor.

US News also had an updated VP list for both candidates.

In his series of VP candidates, the WSJ's Brad Haynes profiles Mitt Romney.

In other VP profiles, Human Events John Gizzi looks at Sen. Jim DeMint.

Stuart Rothenberg wonders if Carly Fiorina is the answer to McCain's prayers for VP.

Douglas Burns jumps on the Sarah Palin bandwagon.

The Philly Inquirer Larry Eichel says there's no good guide for choosing a VP.