President Donald Trump can't be stopped from tweeting and otherwise talking about the Russia investigation. But by continuing to expostulate, he risks not only incriminating himself but irritating the prosecutor overseeing the probe. 

Some observers speculated that the arrival of Trump's personal lawyer, Marc Kasowitz, would spell the end of the president's off-the-cuff comments. Not so. Whatever Kasowitz has told his longtime client, the president is still running his mouth. 

On Sunday morning, the president tweeted: "I believe the James Comey leaks will be far more prevalent than anyone ever thought possible. Totally illegal? Very 'cowardly!'"