Sen. Marco Rubio (R-FLA) on Thursday penned an op-ed for Breitbart, a far-right publication he once dismissed as “not a credible source.”

Rubio’s op-ed for focused on his work reforming the U.S. tax code, a goal Republicans appear to have surreptitiously turned their focus on after the devastating defeat of several versions of their healthcare bills.

But while he took to the far-right website to make his case for increasing the Child Tax Credit, Rubio once bashed Breitbart as “basically conspiracies and oftentimes manipulated.”

Speaking with Fox News’ Neil Cavuto during the 2016 election, Rubio slammed Breitbart.

“We don’t even credential them for our events,” Rubio said. “This is the same website that reported that Fox News and that you and your guys in the debate gave me the questions so that I could prepare. You know that that’s not true.

“So I literally don’t even talk about the things they report because they’re basically conspiracy theories and oftentimes manipulated.”

Donald Trump's top adviser Steve Bannon once described Breitbart as “platform for the alt-right,” the neo-Nazi movement that rose to prominence in 2016.

This isn't the first time Rubio's come under fire for his hypocrisy. In January, a protestor offered him a human spine after the Florida senator opted to vote for Rex Tillerson as Secretary of State despite clashing with the former Exxon executive over his refusal to call Vladimir Putin a war criminal.