I hope so, but I don't think so. 2016 proved Republicans will literally vote for the tiger that is coming to eat their own children if it has an "R" on it. Why would this be any different?
Anyway with any degree of intelligence already knew Dump is a moron and a fraud long before November 2016. And yet those people voted for him. They may even have voted for him more strongly because he is a moron and a fraud. They eat that up.
If Dump does this Fox will talk about how he had to because of DEEP STATE AND LIBRULZ RUN AMOK GAHH!111!11 and those people will believe him. Flag will be all in (he is already). joe will write a thoughtful post about how it's terrible that this is such a divisive time. Fish will repeat some cheeky talking point he read on PJ Media that morning.
If not one of the conservatives here, who are actually capable of thought, will renounce Dump and the GOP if he does this, then why does anybody expect the national electorate to be affected one bit? Those of us who despise Dump and the GOP will vote against them, but we would anyway. Those watching TV and not paying attention will still do that. The "both siderism" media will keep peddling that false canard ("to ensure fairness we've invited both a Nazi and a Holocaust survivor to debate this issue because the truth must be halfway between them..."
This will be just like a school shooting. Nobody's mind will change no matter the damage and the horror. The people who excuse it will have ample reasons to excuse it again, or even to blame the victims.