Elisa Martinez, a Latina Republican and member of the Navajo Nation, announced Nov. 20 she is joining the race for an open U.S. Senate seat in New Mexico, potentially upending a contest Democrats had considered safe.Elisa Martinez, a Latina Republican and member of the Navajo Nation, announced Nov. 20 she is joining the race for an open U.S. Senate seat in New Mexico, potentially upending a contest Democrats had considered safe.