What did Donald Trump do today?

He complained that the House hadn't heard from witnesses he'd blocked them from hearing.

Immediately after he was impeached, Trump publicly clamored for a big, showy, dramatic impeachment trial—something his defenders in the Senate thought was a bad idea. Recently, though, as more and more damning information has come to light, Trump has become worried about what an actual trial in the Senate would reveal. He is now demanding an immediate dismissal and promising to try to prevent witnesses from appearing.

Meanwhile, Republican senators are now almost entirely unwilling to vote to dismiss the impeachment counts against him, for the same reason.

Today, in an effort to create the false impression that impeachment trials don't involve witnesses and evidence, Trump complained via tweet that "all of this work"—that is, the deposition of witnesses and the presentation of evidence against him—"was supposed to be done by the House, not the Senate!" 

The second article of impeachment against Trump is for obstruction of Congress, for refusing to allow witnesses to testify before the House, or comply with subpoenas.

Why is this a bad thing?

• Presidents aren't above the law, and they're certainly not above the Constitution.

• No innocent person has ever tried to prevent witnesses who could exonerate them from testifying.