Rep. Roger Marshall. Photo: Mark Reinstein/Corbis via Getty Images
Rep. Roger Marshall won the Kansas Republican Senate primary on Tuesday evening, beating former Secretary of State Kris Kobach and a slew of other candidates, AP reports.
Why it matters: Following GOP Sen. Pat Roberts' retirement announcement, some Republicans worry that if Kobach won the primary it would endanger the party's chances of keeping the seat and maintaining a majority in the Senate.
What's next: Marshall will face off against Democratic state Sen. Barbara Bollier — who won the Democratic primary Tuesday — in the general election.