Trumpeters aren't going to take heed. At this stage, anyone supporting Trump fits into two camps:
-True Believers who consider Trump a divine gift that will save them from the cursed Establishment, infernal Deep State and, worse, the corrupting ideal of Liberalism. These people will never change their minds, ever.
-The uninformed. Unlike true believers, they don't see enemies everywhere, they just don't have enough information. They don't pay attention to politics and think Trump is actually trying to pursue policies he promised, like a better healthcare plan than ACA. Since they don't pay attention to politics, and with how much a shitshow it is, they might figure it's not worth the trouble sorting through the shit and go back to what they were doing. Unless Trump does something monumentally stupid to get their attention (like ending subsidy payments and making their health insurance skyrocket) they're not going to change their opinions.