John McCain really didn’t like a question about whether he’s fighting Trump’s every move just for the sake of it, even though it appears that’s exactly what he’s doing.

While speaking to reporters on Capitol Hill on Tuesday, McCain snapped at a Fox News reporter who broached the subject.

“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?” Fox’s Peter Doocey asked McCain.

“Why would you say something that stupid? Why would you ask something that dumb?” McCain demanded.

“Huh?” he continued. “My job as a United States Senator, as a senator from Arizona which I was just re-elected to, you mean I’m somehow going to behave in a way that I block everything because of some personal disagreement?

“That’s a dumb question!” McCain snapped.

Rumors are swirling that McCain may oppose Trump’s tax cuts — an idea wildly popular among Republicans.

The Washington Post reports:

It’s a specter that should stalk the nightmares of Republican leaders: a Senate chamber, packed on Christmas Eve, as lawmakers gather to decide the fate of a tax package that will shape the GOP’s political fortunes. The bill remains one vote shy, and then Sen. John McCain walks in, pauses before the desk, and delivers his second thumbs-down dagger of the year. 

For that reason, the Arizona Republican, who is fighting a public battle with brain cancer, will be among his party’s most closely watched as the year winds down and the tax debate gears up. Yet over his decades in public life, McCain has traced a zigzagging line on the subject, leaving little clear indication of how he’ll approach a potentially decisive vote. A look at the senator’s record on taxes shows that three things seem most important to him: public debate, some help for the middle class, and not exploding the deficit.  

Earlier this fall, a Senate vote on an Obamacare overhaul was delayed, so McCain could return from cancer treatment.

That backfired when, upon his return, he sided with the Democrats and effectively protected Obamacare.

CNBC reported:

Sen. John McCain, R-Ariz., on Friday said he “cannot in good conscience vote” for the latest GOP Obamacare repeal plan.

McCain is one of four Republican senators who have been undecided on the proposal, known as the Graham-Cassidy bill, and his opposition dealt the bill’s chances a significant blow. Health care stocks jumped on the news.

In a statement, McCain said his opposition stemmed in large part from how rapidly the bill, nicknamed for Republican Sens. Lindsey Graham of South Carolina and Bill Cassidy of Louisiana, was being pushed through the Senate in order to meet a September 30 procedural deadline.

McCain said he cannot vote for the bill without knowing how it will affect premiums, how much it will cost, and how many people it would help or hurt.

“Without a full CBO score, which won’t be available by the end of the month, we won’t have reliable answers to any of those questions.” he said.