Former L.A. Mayor Antonio Villaraigosa will not run for U.S. Senate Los Angeles Times | February 24, 2015 | 2:02 PM Former Los Angeles Mayor Antonio Villaraigosa said he would not enter the race to replace U.S. Sen. Barbara Boxer. His surprise decision leaves state Atty. Gen. Kamala Harris the only major candidate for the seat so far. For more news, go to latimes.com.