Rex Tillerson is speaking out about his time in the Trump administration. Saying that he had to stop President Trump from doing many of the things he wanted to do because the way he wanted to do them was illegal.

According to Fox News:

Former Secretary of State Rex Tillerson claims he always had to remind President Trump some of his plans “violate the law.”

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Tillerson blamed his strained relationship with Trump on the fact they did not share a “common value system” and were “obviously starkly different in our styles.”

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“When the president would say, ‘Here’s what I want to do, and here’s how I want to do it,’ and I’d have to say to him, ‘Well, Mr. President, I understand what you want to do, but you can’t do it that way. It violates the law, it violates the treaty, you know. He got really frustrated,” Tillerson said. “I think he grew tired of me being the guy every day who told him he can’t do that and let’s talk about what he can do.”

He said he told Trump he would be willing to “fight the fight” to change laws in Congress so the president could press forward with his agenda.

Tillerson went on to say that President Trump doesn’t read a lot of materials to get into the details of issues and tends to act on instinct. Something that was foreign to Tillerson coming from a very regimented company like Exxon Mobil.