Rank and file will even if the leadership doesn’t
I would hope that people would vote for jobs over some democratic policy wonk, but the dues still go to the union leadership, so while the rank and file may not, their money will.
Can you imagine the response if Trump tells the rank and file, “we have jobs - lots of good paying jobs - but just not union jobs...you want ‘em? Or would you rather watch your wife work at a call center and Burger King and have your grown kids living in your basement because the union is in the picture?”