I fear that I am going to lapse into a Linda Blair impersonation, the one in the film “The Exorcist” where her head spins round and round.

Donald J. Trump’s head-spinning reversal of previous lies about a meeting with Russians who reportedly were offering dirt on Hillary Clinton during the 2016 campaign has my head about to spin right off my shoulders.

The president denied the meeting was called to talk about his campaign against Hillary. He then reportedly dictated a statement that came out under Don Trump Jr.’s name; the statement said the meeting dealt with the adoption of children. That was a lie!

Now the president say, yep, the meeting was called to talk about the Clinton campaign.

He lied. Now he’s telling some version of the truth?

The question now centers on what special counsel Robert Mueller is going to do with this information.

Is the noose tightening? Is the special counsel headed into a blind alley? Have we caught the president in the lie to end all lies? Might there be a violation of the U.S. Constitution’s Emolument Clause, which prohibits presidents from accepting gifts from foreign governments?

I’ll circle back to something I was taught when I was a youngster: Tell the truth all the time and you won’t have to worry about the lies catching up with you.