Tuesday’s General Election will be watched closely in Iowa, where six candidates’ names are on the ballot for the U.S. Senate seat held since 1984 by retiring Democrat Tom Harkin. Recent polls have shown Republican Joni Ernst and U.S. Rep. Bruce Braley, a Democrat neck-and-neck in the race.

Democratic state Rep. Pat Murphy and Republican businessman Rod Blum are facing off to replace Braley in a tossup in District 1. GOP U.S. Rep. Tom Latham’s District 3 seat also is open and a tossup. Candidates include former Democratic state legislator Staci Appel and Republican David Young, the former chief of staff to U.S. Sen. Chuck Grassley. Experts say the 4th District in conservative northwestern Iowa appears likely to stay with Republican Representative Steve King.

The Secretary of State’s office is open, where incumbent Republican Matt Schultz stepped aside to make an unsuccessful bid for Latham’s congressional seat. Candidates include: Paul Pate; Brad Anderson; Jake Porter and Spencer Highland.

The State Auditor’s race pits Republican Mary Mosiman against Democrat Jonathan Neiderbach. Three candidates are running for Treasurer of State, including incumbent Democrat Michael Fitzgerald, Republican Sam Clovis, and Independent party candidate Keith Laube. Incumbent Republican Bill Northey is running for re-election against Democrat Sherrie Taha and New Independent Party of Iowa candidate Levi Benning for Iowa Secretary of Agriculture. And, incumbent Democrat Tom Miller faces a challenge from Republican Adam Gregg, for the Iowa Attorney General’s job.

Incumbent GOP Gov. Terry Branstad faces four candidates, including Democratic state Sen. Jack Hatch. Incumbents also are up against challengers in races for auditor, treasurer, agriculture secretary and attorney general. State Senate and House seats also are on the November ballot.