Sen. John McCain — ya gotta quit.

Seriously, sorry for the brain cancer and all. But the fact that you’re still a sitting senator means you’re open to constituent accountability — and criticism.

And this latest unhinged blasting of Peter Doocy of Fox News is truly unwarranted.

Doocy, after all, only asked what’s in the back of minds of most political watchers.

“Has your relationship with the president frayed to the point that you are not going to support anything that he comes to you and asks for?” Doocy asked, as Mediaite noted.

McCain’s response?

“Why would you say something that stupid?” he said. “Why would you ask something that dumb? Huh? My job as a United States senator is [as] a senator from Arizona which I was just reelected to. You mean that I am somehow going to behave in a way that I’m going to block everything because of some personal disagreement?”

Ummm … yes. That’s exactly what Doocy was asking to clarify — because that’s exactly what the majority of conservatives believe.

McCain’s contempt for Trump stretches long. The two have traded public barbs for quite some time.

But it was McCain who recently shuffled across the Senate floor to cast his dramatic thumbs-down vote for Trump-pressed, Trump-promised Obamacare reform. And it was McCain who just came out and spoke harshly about what he called “half-baked nationalism,” an obvious reference to the type of America First mentality that Trump — and Stephen Bannon, for that matter — ushered into the nation.

“That’s a dumb question,” McCain told Doocy.

Well, really it’s not. It’s the main question to ask McCain — the elephant in the room, so to speak. And the way McCain reacted gives rise to a famous Shakespearean principle that goes like this, with proper gender substitution: The gentleman doth protest too much, methinks.

First appeared at The Washington Times.