Former Senate Majority Leader Amy Koch reaffirmed Monday that she will not run for re-election in November.

Koch resigned her leadership post in mid-December and said she would not seek another term after being confronted about having an affair with a male staffer.

In an exclusive Star Tribune interview last week, Koch said she had been overwhelmed by support in her district and wouldn’t entirely rule out another run.

But she slammed shut the idea Monday, after returning to the Capitol and conducting her first major series of interviews since resigning her leadership post.

“I won’t be running again,” the Buffalo Republican said from her new, smaller office in the Capitol.

Koch has declined to say whether she is getting a divorce or is still with the Senate staffer, whom she has refused to identify.

“Personally, I’ve got things I have to deal with and it’s going to be a long road,” Koch said. “That’s going to be my main focus moving forward.”

Koch, 40, represents Senate District 19, a Republican stronghold which includes Monticello, Buffalo and Delano. She has represented the district since 2005.