People in parts of four Iowa counties, including the most of eastern Story County will pick a new state senator Tuesday. The seat in the Senate's 25th District has been vacant since former Majority Leader Bill Dix resigned almost a month ago after being caught on video at a bar kissing a female lobbyist. Republican Annette Sweeney is running against Democrat Tracy Freese. The Secretary of State's office says Republicans in the district hold an almost two-to-one advantage over Democrats in voter registration numbers.