Former Speaker of the House and longtime Trump supporter Newt Gingrich is seriously worried about the future of Donald Trump’s presidency.

Gingrich, who has consistently been one of Trump’s most optimistic supporters, said Friday morning that Trump is more isolated than he realizes and needs to make “serious changes” if he’s going to have a stable presidency.

“I think he’s in a position right now where he’s much more isolated than he realizes,” Gingrich said in an interview with Fox News’ Bill Hemmer. “On the Hill, he has far more people willing to sit to one side and not help him right now, and I think that he needs to recognize that he’s taken a good first step with bringing in General Kelly, but he needs to think about what has not worked. You don’t get down to 35 percent approval and have people in your own party shooting at you and conclude that everything’s going fine.”

“How many times have we had this conversation? It was John McCain, Gold Star families and Access Hollywood. Is this week that much different than the numerous other situations?” Hemmer asked.