Trump Is the President of Lost Opportunities

Mr. Dionne is a contributing Opinion writer.

You can describe the costs of Donald Trump’s second presidency by the damage he has done — to the rule of law, to the United States’ standing in the world, to the constraints on corruption and self-dealing we once took for granted.

As Mr. Trump closes in on 500 days in office, it is even more devastating to measure the extent to which his has become the presidency of lost opportunities.