WASHINGTON—Hearkening back to the dishonesty glory days of the 2016 election campaign, U.S. President Donald Trump made a startling 20 false claims in one speech last week.

As a general rule, the longer a Trump speech is, the more false claims he is likely to make. This speech, to the Conservative Political Action Conference on Friday, was a 75-minute ramble in which Trump jumped without warning from subject to subject, lying all the while — about immigration, about trade, about the economy, about the Obama administration.

Read more: Minute by minute at Donald Trump’s wild, rambling CPAC speech

Trump did not stop there. He also made five false claims in a Saturday night phone call to fawning Fox News host Jeanine Pirro, 12 false claims on Twitter, and six false claims at a White House meeting on school safety. All together, he made 44 false claims in the seven-day period.

Trump is now up to 1,218 false claims for the first 402 days of his presidency, an average of 3.0 per day.

If Trump is a serial liar, why call this a list of “false claims,” not lies? The answer is that we can’t be sure that each and every one was intentional. In some cases, he may have been confused or ignorant. What we know, objectively, is that he was not telling the truth.

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