Donald J. Trump keeps harping on a canard, which is that Barack Obama “did nothing” when he learned in the summer of 2016 about Russian efforts to hack into our electoral process.

Wrong, Mr. President.

Trump keeps dodging the question about whether he believes the Russians sought to influence the 2016 presidential election. Today, he once again gave the Russians some political cover by saying that “other countries” are hacking us, too.

My point here, though, is that President Obama did react to reports of Russian hacking.

He imposed economic sanctions against individuals; he tossed Russian diplomats out of the United States; he closed two Russian diplomatic compounds — all of this in reaction to reports of Russian hacking.

Trump is having none of it. He wants to divert attention from the questions and suspicion that continues to swirl around him regarding the Russians and whatever — if any — relationship they had with the Trump presidential campaign.

I get that presidents have blamed their immediate predecessors for real and imagined problems. Obama laid a lot of blame at the feet of his predecessor, George W. Bush — although he did give the Bush administration plenty of credit for the work it had done in helping locate Osama bin Laden prior to the May 2011 commando raid that killed the al-Qaeda leader.

Is there ever going to be a moment when the current president would offer a good word to his immediate predecessor? Don’t hold your breath. I won’t.

As for Trump’s insistence that Obama did “nothing” to respond to Russian hackers, that’s just another lie.