Americans of a certain age who follow politics and policy closely still have vivid memories of the 2000 election — bad memories, and not just because the man who lost the popular vote somehow ended up in office. For the campaign leading up to that end game was nightmarish too.

You see, one candidate, George W. Bush, was dishonest in a way that was unprecedented in U.S. politics. Most notably, he proposed big tax cuts for the rich while insisting, in raw denial of arithmetic, that they were targeted for the middle class. These campaign lies presaged what would happen during his administration — an administration that, let us not forget, took America to war on false pretenses.

Yet throughout the campaign most media coverage gave the impression that Mr. Bush was a bluff, straightforward guy, while portraying Al Gore — whose policy proposals added up, and whose critiques of the Bush plan were completely accurate — as slippery and dishonest. Mr. Gore’s mendacity was supposedly demonstrated by trivial anecdotes, none significant, some of them simply false. No, he never claimed to have invented the internet. But the image stuck.

And right now I and many others have the sick, sinking feeling that it’s happening again.