1. Don't even try to reason with them because they are immune to reason.
2. Give them ZERO respect because respect is earned and liar deserve no respect.
3. Talk down to them in the most condescending ways.
4. Be cruel and show your contempt for them.
5. Intimidate them.
6. Lecture them and don't let them get a word in edgewise.
7. Ridicule them and ridicule Trump.
8. When they won't accept the facts assault their integrity or lack thereof.
9. Call them liars because they are. Don't mince words.
10. Demolish their feelings.
Trump supporters are not as stupid as you may think but they are as purposefully ignorant as they appear and more evil than you'll ever know. Those scumbags are not your opponents, they are your enemies. Vanquish them.