Obama auditioning other possible VPs?

Barack Obama campaigns today in what he hopes will be a battleground state, accompanied by potential names on his short list for a running mate.

The presumptive Democratic nominee wants to contest Virginia, recently a Republican stronghold, and its 13 electoral votes.

Under pressure from supporters of Hillary Clinton to pick her, Obama is scheduled to appear at a rally in Bristol, Va., with former Governor Mark Warner, then a rally this evening in Bristow with current Governor Tim Kaine and Senator Jim Webb.

Webb, in particular, has been mentioned as a possible running mate because of their shared opposition to the war in Iraq and Webb's resume as a former Marine.

Obama on Wednesday named a three-person vetting committee, including Caroline Kennedy Schlossberg, and appears in no hurry to select a vice presidential nominee.

"We're not going to be rushed into it. I don't think Senator Clinton expects a quick decision and I don't even know that she's necessarily interested in that," Obama told NBC in an interview Wednesday evening.

The Illinois senator clinched the nomination Tuesday and Clinton said last night she will hold an event with supporters in Saturday where she will endorse Obama and call for party unity.