Utah Republican Rep. John Curtis , who will replace Republican Sen. Mitt Romney, has decided to take on President-elect Donald Trump.

The representative sat for an interview with ABC News anchor Jonathan Karl where he said that he would challenged his own son who said that the president-elect has a mandate.

“You do hear some of your colleagues, your future colleagues, in the Senate that say, ‘He won. He’s got a mandate, he deserves, you know, everybody that he’s chosen,’” the anchor said of the president-elect’s cabinet nominees. “So, in other words, ‘rubber stamp’.”

“Yeah, I heard that from my son, by the way, at Thanksgiving,” the representative said. “He said, ‘Dad, I’m a self-described, I took the red pill.’ So he kind of set that up. And my response to him was a couple of things. One, in kind of a joking way, I said, ‘You know, I did get more votes than him in Utah. Does that give me a mandate?’

“But let me come back to this kind of this concept that I think me speaking my mind and, and me being up front makes the president a better president. And right now, I’m interviewing these nominees. And I think people forget the advice part of ‘advice and consent.’ I can’t advise the president if I haven’t thoroughly talked to these people, if I haven’t investigated everything about them, if I haven’t learned their strengths and their weaknesses. And I think I owe that to the president. And I think if the better job I do, the better president he will be,” he said.

And he said he was not concerned about getting “heat” from supporters of the president-elect.

“Listen, anybody who wants to give me heat for doing my job, bring it on,” he said. “This is my job. It’s my constitutional responsibility. These same people are the same people who would have said earlier, ‘You need to take power back from the executive branch. You need to do your job.’ I have heard that from these very same people, and that’s what I’m doing.”