Joe Baca, a longtime Democrat who represented San Bernardino County citizens for more than 30 years as a trustee for the San Bernardino Community College District, an assemblyman, state senator and congressman, is now a registered Republican. Baca, 68, of Fontana, changed his party affiliation on June 2, said Melissa Eickman, a spokeswoman for the San Bernardino County Elections Office. Prior to making the switch, Baca had been a registered Democrat in San Bernardino County since January 1976, Eickman said. Baca said Friday he and his wife thought long and hard about the decision, which he said reflects his “core...