This is a good question but is also, I think, based on an outdated reality. We no longer have a viable political system as it has failed all but the elite billionaire class for decades.
The only people left who can be 'brought out in support of the candidate" for the election are the shrinking minority for Trump who are socially psychotic with cultist characteristics. The Rebublican Party has no supporters other than Trumpists. What was the mainstream Republicans have gone over to Biden who's history is indistinguishable from an old style New England Republican.
The opposition, that is vast, is everyone else with any education and/or planetary perspective. Their motivation is a distilled version of the lesser evil so inherently cynical and realpolitik. Our only hope is Biden as a tourniquet and then, possibly something. This is not voting for an open door but the only thing that can prevent the door to a national survival from closing.