Oh, man, I want the president of the United States to accept U.S. Sen. Ted Cruz’s request to campaign for him in Texas.

You see, this is a potential “opposition research” gold mine for Democrats seeking to shoot down the Cruz Missile’s attempt at re-election to a second term in the Senate. Democratic challenger Beto O’Rourke — who’s in a neck-and-neck race with Cruz — ought to welcome it, too.

You’ve got Donald Trump’s infamous nickname for Cruz, who he labeled as “Lyin’ Ted” while competing against him for the 2016 Republican Party presidential primary campaign.

Then he posted that hideous picture of Heidi Cruz, the senator’s wife, on Twitter and sought to compare her unflatteringly with Melania Trump, the future president’s model-wife.

Let us not forget how the GOP nominee then sought to suggest that Ted Cruz’s father, Rafael, might have been somehow complicit in President Kennedy’s assassination because he supposedly was seen sharing a meal with Lee Harvey Oswald.

All of this enraged Sen. Cruz. As it should have.

He launched into a scathing attack on Trump, calling him out for the way he treated his family; he called Trump “amoral” and a “pathological liar.” He said Trump has no moral grounding.

Has any of that changed in Sen. Cruz’s mind? He says it has. The public domain, however, is still loaded with those angry words of two years ago, which in reality he cannot take back.

And does Trump think differently now of the man he once called “Lyin’ Ted”? Hmm. I am betting … no!

By all means, Mr. President, come to Texas. Campaign for Cruz. If you come anywhere near where I live in the D/FW Metroplex, I’ll be there with bells on to listen to your off-the-rails campaign-rally speech.

I’ll be sure to have my notebook and pen in hand.