Speaking to volunteers at a campaign office in Davenport, Iowa, on Wednesday, Biden said the state propelled Obama to the White House that year, and called it the center of the political universe.

“You know you guys are the guys that put Barack on the road,” Biden said, according to a pool report. “I may have been a little disappointed at the time, but we got the right order.”

Biden ran unsuccessfully for the Democratic nomination in 2008 against Obama. His comments came hours after he half-jokingly told a Republican voter he could cast a ballot for Biden for president in 2016.

“Look, I’m not trying to talk you into voting for me, I just wanted to say hi to you. And after it's all over, when your insurance rates go down, then you’ll vote for me in 2016. I’ll talk to you later,” Biden said in Florida.

Supporters at the Iowa campaign office ribbed the vice president about the earlier comments.

“2016! You're my president, you know that!” one woman told Biden before presenting him with a T-shirt.

Biden hosted two rallies in Florida on Wednesday before flying into Iowa, where he will campaign in Muscatine and Fort Dodge on Thursday.

He poked fun at himself for inadvertently referring to Iowa at a rally in Ohio last week. Both campaigns have spent a lot of time in Ohio, a battleground state seen as crucial for the presidency.

“I’ve been living in Ohio like I used to live in Iowa,” Biden said. “As a matter of fact, I got in trouble ... I was in Ohio talking about it and saying it’s good to be here in Ohio and then I said ... in Iowa.”

Biden had a similar flub at a campaign rally at Ocala, Fla., earlier Wednesday. He blasted Mitt Romney for ads running in Ohio that criticize Obama’s part in Chrysler being sold to Fiat and moving manufacturing to China.

During the Florida event, Biden cited an editorial in the Cleveland Plain Dealer that called the ads a “masterpiece in misdirection.” Biden credited the Ohio paper as one of the “major newspapers in this state.”