AUSTIN, Texas (AP) — Dallas dental mogul David Alameel and frequent candidate Kesha Rogers have advanced to a runoff to decide the Democratic U.S. Senate nomination.

They were the top-two vote-getters in Tuesday’s five-candidate field for a post held by Republican U.S. Sen. John Cornyn, but neither won a majority.

The runoff is May 27.

Alameel is a multimillionaire who has been endorsed by Democratic gubernatorial nominee Wendy Davis. He has given to both Democratic and Republican candidates but now calls the GOP too extreme.

Rogers wants to impeach President Barack Obama but was the Democratic nominee during unsuccessful runs for Congress from a suburban Houston district in 2010 and 2012.

The Associated Press had called the race for Alameel, but uncalled it after a county’s results had been miscounted.