President Donald Trump on Sunday referred to The New York Times as a “treasonous” media outlet on Sunday, threatening to expand his legal battle against the newspaper involving an ongoing multi-billion-dollar lawsuit.

In an angry post on his Truth Social platform, Trump lashed out at the “corrupt and failing” Times over a headline that questioned the achievements of the war with Iran. The president accused the newspaper of publishing false coverage about the conflict and vowed to fold that reporting into his legal fight against the outlet.

He denounced the paper’s coverage as “treasonous” and declared: “I will be adding all of their false and ridiculous reporting to my multi Billion Dollar lawsuit against them,” adding that “they are Criminals!”