I admit readily at times to being a little slow on the uptake.

That said, I am left to wonder: If the president of the United States has been “totally exonerated” of any criminal activity, if he is as pure as fresh snow, if he has been the victim of the worst “witch hunt” since the Salem Witch Trials, why is he suggesting that Robert Mueller “should not testify” before congressional committees?

Robert Mueller is the special counsel who filed that 448-page report that cleared Donald Trump of conspiracy to collude with Russians who attacked our electoral system in 2016. However, he took a pass on whether the president obstructed justice. Mueller did not clear Trump of obstructing, but lacked sufficient evidence, he said, to file a criminal complaint.

Is that “exoneration”? Nope. It isn’t. Mueller said so in his report.

But the president keeps saying he’s in the clear. He keeps yapping about the witch hunt. He now endorses the notion that his term should be extended two years to make up for the time “stolen” by Mueller’s probe into The Russia Thing.

Why not let the former FBI director and a man of impeccable integrity tell Congress what he knows? Hey, the president says he’s in the clear. Let’s allow Mueller to affirm what the president has said.

Oh, wait! Except that he won’t do anything of the sort.

OK, that’s why Trump is digging in against Mueller talking to Congress. I get it.