If those votes get high enough to start impacting elections, they’ll change their policies/candidates to attract new voters.

Honestly, I don't even really believe that'll happen-- but that won't stop me. I've come to the regrettable conclusion that the Democrats will never be anything more than the velvet liner covering the iron gauntlet that is the Republican party; and the things it'd take to disabuse me of that notion, the CIA has killed people for attempting before.