American national election studies (anes) surveys are done frequently and ask respondents whom they voted for, their party affiliation, and their opinions of political parties and their candidates. these surveys political scientists, what?

Ben's town is holding an election for mayor next month, and he is trying to decide which of the two candidates for mayor will get his vote. ben thinks that his town's air quality has decreased in recent years. because of this belief, what should ben look for when deciding on a candidate?