Research suggests party affiliation is main voter cue, but identity of candidates could offer boost

The presidential election is just weeks away, and the matchup between Vice President Kamala Harris and former President Donald Trump is historic in so many ways. In one instance, a former president was renominated but faces conviction on 34 felony counts of business fraud, and in the other instance, a vice president replaced her party's standing president as the presidential nominee after the Democratic primary concluded.