It’s rare for politicians of the same party as the president to withhold their support for a president who declares his intention to seek re-election.

That is what is happening within the Republican Party.

Mitt Romney, who wants to represent Utah in the U.S. Senate, says he cannot commit to supporting Donald Trump, who Romney once described as a “phony” and a “fraud.” Same for Sen. John Cornyn of Texas; ditto for Sen. Ron Johnson of Wisconsin; also ditto for lame-duck House Speaker Paul Ryan, also of Wisconsin.

Hey, what’s going on here?

Is the president,  um, toxic to Republicans? Are his GOP brethren afraid to get too close to the guy who is the titular head of their political party?

Hmm. Maybe they’re looking at recent history.

Trump backed a sitting U.S. senator from Alabama, Luther Strange, only to watch him lose that state’s GOP primary to Roy Moore, the guy accused by several women of sexual assault; Trump then threw his backing behind Moore, who ended up losing to Democratic U.S. Sen. Doug Jones in the special election.

Trump then backed a Republican candidate for the U.S. House in Pennsylvania. Oops! Then the GOP candidate lost to the Democrat.

I’m thinking the Republicans might be taking stock of the president’s actual political clout, looking past the braggadocio that flies out of the president’s mouth.

Trump boasts about all the “winning” he has brought to government and to public policy. The way I look at it, he isn’t winning nearly as much as he would like us all to believe.

The act of “winning” in Trump’s world bears no resemblance to the reality the president is facing as he confronts what is looking more and more like a difficult ride through the 2018 midterm election.

That, of course, presumes the president is able to discern the politically obvious. Of that I am not at all certain.