It looks as though the Twitter Universe is abuzz with demands that U.S. Sen. Lindsey Graham resign his public office. Why?

Well, the senator — who once served as a judge advocate lawyer for the U.S. Air Force — has invited Donald J. Trump Jr. to break the law.

He told Don Jr. that it’s all right with him — Sen. Graham — if the president’s oldest son wanted to ignore a subpoena to appear before the U.S. Senate Intelligence Committee. Yes sir, there you have it.

Graham has said it’s OK for Don Jr. to ignore a duly constituted congressional committee’s order to do what it demands, which is to testify under oath about the ongoing matter involving Daddy Trump’s relationships with Russian government officials and business leaders.

You know what? I think I’m going to weigh in on that one, too.

Yeah, Graham ought to resign. He chairs the Senate Judiciary Committee, for criminy sakes! Graham should not ever tell a potential witness to stiff a congressional committee chairman’s demand that he testify before the panel.

Graham has done an amazing pirouette regarding the Donald Trump. Back when he and Trump were competing for the 2016 Republican presidential nomination, Graham called Trump “unfit” for the presidency; he called him a liar and charlatan. Then he got beat for the nomination and now has sided with Trump, suggesting that the investigations into Trump’s dealings all are part of a campaign to destroy his presidency.

The only Graham hasn’t said, of course, is that he was wrong to say those nasty things about Trump back when they were political adversaries. That’s right. Graham is quiet on the quality of Donald Trump’s character.

Still, he is as wrong as he can possibly be to tell Donald Trump Jr. to break the law.

Sen. Graham needs to quit.