How much influence does Taylor Swift actually have? Would her endorsement in a presidential election move voters? Has her presence at NFL games already created new fans among young women? Some have used polling to suggest it has, so in this installment of the 538 Politics podcast, we ask "good or bad use of polling?"The crew also looks at some of the minor primary contests between now and the South Carolina Republican presidential primary and spotlights the biggest takeaways from last quarter's campaign fundraising numbers.Learn more about your ad choices. Visit megaphone.fm/adchoices