A group of fed-up techies and “radical centrists” is launching a counteroffensive to what they call an out-of-touch lefty agenda that’s driving people out of California. An event in Mountain View, Calif. — home to Alphabet, Waymo and other tech giants — drew San Jose Mayor Matt Mahan , San Francisco District Attorney Brooke Jenkins and other moderate Democrats alonsgside hundreds of raucous attendees who vowed to “take back” California from unions and other special interests. “Some people have