Trump’s conviction in impeachment trial not justified even if Bolton claims are true

After sitting on their hands and listening to arguments for a week in President Trump’s impeachment trial, senators were finally allowed to pose their own questions Wednesday. It proved to be illuminating.

As is often the case, the first question was the most penetrating and important one. It got to the heart of the Democrats’ principal accusation regarding why they contend the president should be removed from office.

Democrats claim that when Trump asked Ukrainian President Volodymyr Zelensky to look into what Trump called troubling actions by former Vice President...