Oakland County District Court Judge Kim Small (R) has decided not to run for Michigan's open Senate seat, according to two people with knowledge of her plans.

"There was an outpour of support for Judge Small among both statewide and national leaders," said GOP consultant Brad Fingeroot, who had been supporting Small's potential bid. "Her decision to pass on running comes as unwelcome news for those encouraging of a Small for Senate candidacy. She looks forward to continuing to serve her community."

According to another person familiar with Small's decision, she will announce Monday that she has decided not to run.

She had been preparing for a potential Senate bid and had met with the National Republican Senatorial Committee, as Post Politics reported in July.

Small's decision comes as a big break to former secretary of state Terri Lynn Land, who remains the GOP front-runner and is unopposed.

The winner of the Republican primary is likely to face Rep. Gary Peters (D) in the general election. Democrats remain favored to retain the seat, which is being vacated by retiring Sen. Carl Levin (D).