Candidate filing launched Tuesday morning at the secretary of state’s office in Jefferson City. Candidates started lining up more than an hour before filing began at 8 a.m.

Those who arrive Tuesday will draw numbers to determine the order of ballot placement on the August primary ballots.

Republican U.S. Sen. Roy Blunt is expected to file for re-election and face a challenge from Democratic Secretary of State Jason Kander.

At least four Republicans and one Democrat have said they will run to replace term-limited Gov. Jay Nixon.

The ballot also will include other statewide offices, federal and state legislative seats and some judgeships.

Filing ends March 29.