washington economy terrorism healthcare rank top three concern face americans cast ballot tuesday presidential election accord early read reuters/ipsos election day poll poll 35,000 people find 25 percent voters pick economy important problem another 14 percent name terrorism/terrorist attack 13 percent pick healthcare contrast economy concern 46 percent american voters 2012 accord reuters/ipsos national track poll four years ago almost nobody list terrorism top concern 2012 percent list healthcare top worry signature trump issue immigration choose percent voters important issue tuesday poll poll read update poll responses tally vote count across country economy top list worry face american voters reuters/ipsos