By Jared Favole and Carol E. Lee

Associated Press

This might be President Barack Obama's last campaign, but not Vice President Joe Biden's.

Mr. Biden, who cast his ballot Tuesday after waiting in line to vote in his home state of Delaware shortly after 7 a.m., was asked if this was the last time he'll vote for himself. The vice president grinned. “No, I don't think so,” he said.

Speculation has swirled about whether Mr. Biden would make a run for the White House in 2016. He hasn't ruled it out. If he got into the race it would be his third presidential campaign. He's made two unsuccessful bids in the past, including in 2008…