As if the U.S. Senate runoff between Republicans John Cornyn and Ken Paxton could get more fascinating …

Well, it did with the endorsement today of the Texas attorney general over the incumbent U.S. senator by none other than Donald J. Trump. This is the kind of news that fills me with — oh, I don’t know — a mixture of outrage and cautious optimism.

I now will set the table briefly. I did not vote in the GOP primary in early May. I cast my vote for the winner of the Democratic nomination, Austin state Rep. James Talarico. I am standing foursquare behind this young man.

Trump’s endorsement of Paxton is a statement in favor of the moronic MAGA movement that continues to roil the Republican Party. If you’re a MAGA moron, then Paxton’s your guy. The AG has been snared by scandal after scandal since his election to statewide office in 2014. During his impeachment and subsequent trial over myriad corruption charges, we learned about Paxton’s extramarital affairs. His wife, state Sen. Angela Paxton, R-McKinney, had enough and filed for divorce on what she called “biblical grounds.” We all know what that means.

The Cornyn campaign already has introduced that aspect of Paxton’s past into the runoff campaign. It’s gotten ugly. It is going to get a whole lot uglier. Believe me!

The runoff is set for a few days from now. Polls across the spectrum show Talarico within spitting distance of Cornyn … and actually leading Paxton.

A part of me is enraged by Trump’s endorsement of a deeply flawed candidate over a principled conservative who on occasion has reached across the aisle to work with Democrats on legislation. That’s a non-starter for your average MAGA dipshit.

However, on the other side we well could have the real prospect of Texas voters getting to decide whether they want a scarred GOP senator or a fresh voice who speaks with crystal clarity. Talarico is the rare Democrat who doesn’t shove his Christian faith to the back of the shelf. He talks about it with pride, but also warns of the dangers of “Christian nationalism” that seeks to turn the United States of America into a theological state … which is something the founders expressly forbade when they wrote the Constitution.

Let us see how this GOP runoff plays out, shall we? I sense we are headed for a wild ride to the finish.