My vertigo is getting serious as I listen to Donald J. Trump’s latest 180-degree pivot on that so-called “Russia thing.”

The man who has called the Russian meddling in the 2016 presidential election a “hoax” and a product of “fake news” now has defamed his immediate predecessor — again!

Trump says Barack H. Obama “colluded” with Russians to influence the election. He says Hillary Clinton did, too.

This man, the president, make no sense … at all! None. He blathers, bloviates and blusters about this and that. He cannot differentiate between fact and fiction. He has just promulgated another fictitious story line — a lie, if you will — about President Obama.

Trump seemed to dovetail from a Washington Post story that details in tremendous detail about the Obama administration’s struggle to deal with Russian hacking in advance of this past year’s election. Then he went further, suggesting that Obama’s flinching on action against Russia means he colluded with them.

How does this make sense? U.S. intelligence agencies have concluded that Russia sought to influence the election to favor Trump. He now seems to suggest that Obama worked with the Russians to elect the fellow who was running against Obama’s preferred candidate: Hillary Rodham Clinton.

Here is what Trump tweeted: