Former US ambassador Christopher Hill told MSNBC on Friday that Trump has so “diminished” the presidency that no one at the G20 summit in Argentina takes him seriously anymore.

“I think what we’re really seeing is a much diminished American presidency,” Hill said, pointing to the president’s many problems, from his former lawyer Michael Cohen’s cooperation with special counsel Robert Mueller to losing control of Congress.

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“It’s a sense that this is a president who simply has never mastered his brief. He doesn’t seem to understand these issues,” Hill said, casting doubt on the president’s ability to do his job.

“All he can do is continue to be a disrupter. The world, they don’t believe anything he says,” he added. “I don’t think people are taking him seriously right now, and I think this is the real problem moving forward.”

Watch the video below.