Daniel McCarthy: Trump is doing exactly what he was elected to do

(Damon Winter | The New York Times) President Trump departs by helicopter from the South Lawn of the White House en route to a campaign event.The impeachment effort against President Trump hinges on his motives. Presidents have wide discretion when dealing with foreign governments, and Mr. Trump’s actions have all been within the scope of his office’s power. But has he used that power for personal gain?

Ukrainian prosecutors took an interest in possible corruption involving Burisma Holdings, the company that paid Hunter Biden tens of thousands of dollars per month to serve on its board, long before Mr. Trump became president. And the Obama administration, including Vice President Joseph…