Sunday on CNN’s “Reliable Sources,” host Brian Stelter reacted to President Donald Trump tweeting Sunday morning that Secretary of State Rex Tillerson was wasting his time trying to negotiate with North Korea and asked if “folks on TV should be questioning” the Trump’s stability.

Stelter said, “I want to underscore how extraordinary this is to see the president calling out of his secretary of state. He’s saying Rex is wasting his time trying to negotiate with little rocket man. When I look at this, I wonder, are we at the point where folks on TV should be questioning the president’s stability?”

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