SACRAMENTO — Republican activists disenchanted with Gov. Arnold Schwarzenegger said Thursday that they will try to strip the governor of the party's endorsement unless he fires his new chief of staff, Democrat Susan P. Kennedy. Restive Republicans said they would rally conservatives behind a resolution, to be offered at the state GOP convention in San Jose next month, that may give Schwarzenegger an ultimatum: Dump Kennedy by March 15 or the party will withdraw its backing of his reelection bid. --snip-- "We've gotten to the point where we've just had it with the guy," said Michael Schroeder, an attorney from...