Katie Porter is a “master manipulator” who embodies everything wrong with politics today, according to her husband of 10 years. Matthew Hoffman, 50, told The Post the hotheaded liberal contender for California governor is a bad choice to run the deep blue state. Referring to video clips that exposed Porter’s volatile temper and hostile treatment of staffers and journalists, he said, “It’s about time” they came out. “The amount of staff she goes through. The horrible things that she says [about