** FILE ** In this Jan. 29, 2008 file photo, Sen. Claire McCaskill, D-Mo., right, listens to Democratic presidential hopeful Sen. Barack Obama, D-Ill.,talk with reporters during a flight from Washington to Wichita, Kan. The plainspoken former prosecutor and state auditor has been all over TV news and political talk shows as a top surrogate for Obama’s campaign. (AP Photo/Charles Rex Arbogast, File)
