Vote For Who You Think Would be the Best President
By 
As the candidates become better known, there is now essentially no difference in how any of the candidates are polling head-to-head against Donald Trump:
Nationscape data show that the Democratic candidate now do about equally well against Trump in trial heats. https://t.co/GbN6OPXzW3— John Sides (@johnmsides) March 3, 2020
Nobody will ever know, ex ante or ex post, who the most “electable” candidate is or was. Vote for who you like.