Talkshow host Conan O’Brien poked fun at Vice President Biden this week for using the double negative when asked if he plans to run for president in 2016.

On an Amtrak train last week, Biden was asked that question in an interview on CNN.

“There may be reasons I don’t run but there’s no obvious reason for me why I think I should not run,” Biden said. 

On TBS’s “Conan” this week, O’Brien aired a fake ad, which he said would be the first of Biden’s campaign. 

Joe BidenJoseph (Joe) Robinette BidenBiden slams Trump over golf gif hitting Clinton Overnight Tech: Equifax hit by earlier undisclosed hack | Facebook takes heat over Russian ads | Alt-right Twitter rival may lose domain Overnight Finance: CBO to release limited analysis of ObamaCare repeal bill | DOJ investigates Equifax stock sales | House weighs tougher rules for banks dealing with North Korea MORE has served this country for over 40 years so when he says he’s not uninterested in seeking the presidency, it shouldn’t be a no-brainer to refuse to disbelieve him. Biden won’t just not undermine the economy. He would oppose all efforts to negate unemployment. He’s on the record against not blocking anti-progressive legislation that doesn’t not destabilize working families. Joe Biden — no compelling reason not to vote for the opposite of his opponent,” the narrator of the fake ad says. 

“I’m Joe Biden and I don’t not fully and especially not partially endorse this message,” a person pretending to be Biden said at the end. 

Biden said on CNN he would likely make a decision about a White House bid during the summer of 2015. 

He previously ran for the Democratic nomination in 1988 and 2008. 

Hillary Clinton is considered the clear front-runner in the 2016 primary race if she decides to run.