DES MOINES, Iowa (AP) — She'd been among the candidates trying to establish themselves as the true conservative in the race -- and now that Michele Bachmann is ending her campaign for the GOP presidential nomination, her supporters are up for grabs.

Those who could benefit include Rick Santorum, Newt Gingrich and Rick Perry. Her campaign manager says she doesn't have an endorsement in mind, and that there's no time frame for her to make one.

Bachmann announced today that she's "decided to stand aside," a day after a distant sixth-place finish in the Iowa caucuses.

She said she has no regrets about running, and that she will continue to fight for the causes she emphasized during the campaign. The Minnesota congresswoman repeated referred to President Barack Obama's health care overhaul, and said Republicans can't miss a "once in a lifetime opportunity" to repeal it, along with the financial regulatory overhaul known as Dodd-Frank.

Bachmann, who was born in Iowa, enjoyed a high point in her campaign when she won a Republican straw poll in Ames, Iowa in August. But her campaign steadily lost support since then.