Alberta Premier Jason Kenney has accused Justin Trudeau’s former top aide and best friend Gerald Butts of conspiring with the Obama administration to have the Keystone XL pipeline project kyboshed, according to a report from Politico.

At a forum in Washington, D.C., on Friday, Kenney said he didn’t doubt Butts spoke with Obama’s people in the White House before the project was nixed 48 hours after Trudeau was sworn-in to office.

“I mean, the announcement of President Obama’s veto of Keystone XL came 48 hours after Prime Minister Trudeau was sworn into office,” said Kenney on Friday, according to Politico.

“And I have absolutely no doubt there had been back-channel conversations between his then-Principal Secretary Gerry Butts and the White House that there would be no negative reaction, and there wasn’t. It was a news release, and they walked on to the next issue.”