How many reporters are covering the question of Donald Trump’s alleged liability for campaign finance violations as well as the President’s twitter feed? Mr. Trump is frequently criticized for making inaccurate comments, but this morning on social media he got right to the heart of the matter.

In the following comment delivered via consecutive tweets, the President may not have managed to complete a sentence. But he fairly critiqued the idea that he violated campaign finance law when others made hush-money payments to his...