Earlier in the month, Biden seemed to downplay speculation, telling a voter who asked if he's planning to run for president that he was "going to stick as vice president."
The exchange came just days after Biden told the Republican brother of a supporter that the success of Obama administration policies would convince him to "vote for me in 2016."
At the stop Friday in Beloit, Wis., an elderly man asked Biden if he "was going to run for president this time?"
"Oh no, I am going to stick as vice president," Biden said, leaving it unclear whether he was referring to 2012 or an eventual 2016 bid.
But Biden seemed to acknowledge his earlier comment — and the subsequent media coverage — by then pointing to the collected press corps.
"Y'all hear that, press?" Biden said.
Biden has repeatedly sought his party's presidential nomination, most recently in 2008, when then-Illinois Sen. Barack Obama ended up as the choice of Democratic voters.