Lifelong civilian President Donald Trump on Twitter attacked former Commander of U.S. Forces in Afghanistan Gen. Stanley McChrystal on New Year’s Day, over the retired soldier’s comments on ABC’s This Week on Sunday.

The president’s tweet was prompted by something he got from a Fox News personality, unsurprisingly. Fox’s Laura Ingraham tweeted a story from her Lifezette website about the General, and Trump was retweeting her when he made his comments.