Here's a typical interaction I have with a Trump die-hard:

My criticism of Trump is followed by a deflection of some kind about either Hillary or Obama.  I point out that I didn't vote for Hillary, and that I have now voted for Gary Johnson in 2 elections.  Trump die-hard then pokes fun at Aleppo flub.  I admit that it was a flub, but that Johnson seems to be willing to learn something he doesn't know.  Trump die-hard then points out Trump's business "success".  I then point out how Johnson began a handy-man business in college that grew to over 1000 employees, has never filed for bankruptcy in order to not pay people back, and did it without a $1 million check from his daddy to get started (never mind his being a 2-term GOP governor in a Democrat state).  Sometimes I add in Trump's empty promises on the border wall, or his hypocrisy on his jobs coming back to the US.  This is followed usually by either more deflection, or personal insults.