Sen. John McCain faces his own competitive primary, but the Arizona Republican isn’t worried about taking time out of his own campaign schedule to stump Tuesday for Carly Fiorina, one of his top advisers from his 2008 presidential run. The former Hewlett Packard CEO is now running for Senate in California, but she’s trailing former Rep. Tom Campbell in the Republican primary as they vie to challenge Democratic Sen. Barbara Boxer this fall. McCain will appear with Fiorina at an employee town hall at Affinity Medical Technologies in Irvine to discuss the economy and health care and will also hold fundraisers for Fiorina in Los Angeles and Orange County. A McCain adviser told POLITICO the senator’s jaunt to the neighboring state won’t take him off the trail long: He’s been in Arizona campaigning all last week in the wake of his own primary challenge from former Rep. J.D. Hayworth, and he’ll be back in the state Thursday.