That would possibly have been the case in 1965, but party membership is at historically low levels and in multiple states independents outnumber either single p

That would possibly have been the case in 1965, but party membership is at historically low levels and in multiple states independents outnumber either single party. Unfortunately, 50-65% of people who are eligible to vote actually do so. Often, they do end up voting along party lines, but that's not because of party loyalty so much as a lack of knowledge regarding the candidates. If you give people the opportunity to learn about these things and impress upon them the importance of doing so, they will be more likely to vote rationally.