The whole impeachment drama is starting to shape up less as an investigation of what Donald Trump might have done wrong and more of a constitutional battle. Trump’s position seems to be that a sitting president is immune from criminal prosecution, and Congress cannot investigate him for impeachment if its motive is ‘political’.

There is support for the first point. Many constitutional experts feel that presidents can only be criminally indited after they leave office. The reason? The Constitution provides a special way way to take a president down: impeachment.

Ttump is wrong on his second point. The Constitution does not give the president a pass if he feels that the impeachment is politically motivated. In fact, it almost always is. The president has to turn over the information that Congress requests. The Supreme Court unanimously upheld that principle back in the Nixon Watergate days.

Nancy Pelosi and the Democrats are wasting an opportunity, They should print up little copies of the Constitution in booklet form. Blue covers with an American flag. Hand them out at every rally, debate and voter registration event.

Claim the Constitution as their issue.

Before the Republicans do.