Because of polarization among Americans, the parties are more likely to nominate candidates who are ideological.
Explanation:
In order to avoid losing votes and bear the risk of losing the election for the candidate being inclined towards specific thinking, the parties try to be on their safer side and choose candidates that are ideologically sound.
Knowing full well that there is a prevalence of polarization of ideas among the Americans, the parties try to attract both the polarized groups towards themselves by giving a candidate who has developmental ideas that both the groups seek.
