As much as I understand why Trump has not taken the pledge up to now it may be time to do it. We need to get on with the election.
A lot of folks really don’t care if Trump ran in the Man-in-the-Moon party, he is the loudest voice in favor of what they want.
The American system of electing presidents is what has destined it to this oligarchy of parties. In a lot of European countries they do coalitions and runoffs so as to resolve situations where all parties polled less than a majority. Not so our present Constitution.