Democrats keep propping up Republican has-beens like Liz Cheney and Adam Kinzinger and Not Really Never Trumpers like Nikki Haley not so much because they're against Trump or even for democracy, per se, so much as for the preservation of the traditional, congenial two party duopoly in which Republicans and Democrats both hold the line on behalf of the interests of the ruling class.
Meanwhile, Republican voters view Democrats and increasingly the GOP establishment as the enemy.