Rep. Dan Burton won the Republican nomination by getting 30 percent of vote against several challengers in Indiana's
Burton is seeking his 15th term from the heavily Republican district.
Burton is Indiana's current longest-serving congressman and faced six challengers who argued it was time for him to go.
He narrowly defeated former state Rep. Luke Messer, who was well-financed with strong ties to many state GOP leaders. Finishing third was Indianapolis physician John McGoff, who received 45 percent of the vote in a narrow 2008 primary loss to Burton.
Construction company worker Tim Crawford of Noblesville won the Democratic nomination, defeating Indiana University cancer researcher Nasser Hanna who had been backed by party officials.