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Thread: In rare public remarks, Rex Tillerson said that he'd have to tell Trump that his directive violates the law. "He doesn't like to read&q

Rex Tillerson gave a blistering assessment of his time serving as President Donald Trump's secretary of state in a rare public appearance, calling the commander-in-chief "undisciplined."

Tillerson told CBS News' Bob Schieffer at an event in Houston Wednesday night that he had never met Trump until the day he was asked to be secretary of state, and described how the pair were quickly at loggerheads once they began working together.

"So often, the president would say here's what I want to do and here's how I want to do it, and I would have to say to him, 'Mr. President I understand what you want to do but you can't do it that way. It violates the law,'" Tillerson said.

He added, "I'd say here's what we can do. We can go back to Congress and get this law changed. And if that's what you want to do, there's nothing wrong with that. I told him I'm ready to go up there and fight the fight, if that's what you want to do."

Tillerson, the former chairman and chief executive of Exxon Mobil, was fired as the country's top diplomat by Trump in a March tweet.