EUGENE, Ore. -- Chelsea Clinton sparred with a Barack Obama supporter who asked whether she would advise her mother Hillary Rodham Clinton to accept the No. 2 spot on the ticket if Obama wins the presidential nomination. "Well, sir, you make a lot of assumptions," Chelsea Clinton said, drawing laughter and applause from the Oregon Democrats on hand Saturday to hear the former first daughter make a campaign pitch for her mom.

The exchange, which took place at the state Democrats' platform convention, began when Lane Community College theater arts student Matt Keating stepped to a microphone and began by saying "With all due respect ..."

"Oh dear," Chelsea shot back.

Undeterred, Keating then went on to ask what advice she would give her mom if Obama offered her the vice presidential spot on the ticket.

The younger Clinton indicated she thought the question was premature, given that voters in Oregon and other primary states have yet to vote on a presidential nominee.

But she also made it clear she fervently backs her mom's bid for the White House.