Stem-cell pioneer to challenge Rep. Dana Rohrabacher

Hans Keirstead, a pioneering stem-cell biologist and multimillionaire businessman who was a professor at UC Irvine for 14 years, announced Thursday he would join the field of Democrats challenging Rep. Dana Rohrabacher, R-Costa Mesa.
“I’m running for Congress because I believe that innovative thinking and a people-first attitude matter to the constituents of this district,” Keirstead said in a news release. “If given the opportunity to represent our community in