Not because Trump is a Republican. Not because of his conservative policies. Not as a way to nullify the outcome of the 2016 election. But because he engaged in high crimes and misdemeanors of exactly the sort the founders had in mind when they created the impeachment process in the U.S. Constitution. The details of those crimes have been laid out a thousand times, but here they are again: Congress voted to give $391 million to Ukraine, an ally that was at war, defending itself against Russia. But Trump withheld that money in a clear violation — an illegal violation...