\ LOS ANGELES (AP) — After scalding defeats this year from Wisconsin to Indiana, organized labor held its ground in California and beat back the latest attempt to dilute union political clout. In a sign of the stakes, labor groups and other Democratic interests funneled at least $75 million into their drive to defeat Proposition 32 on Tuesday's ballot, which would have starved unions of the tens of millions of dollars they use to finance campaigns and political organizing. AFL-CIO President Richard Trumka had declared California a firewall, after Indiana became the 23rd state to pass a law that limits unions' ability to collect fees from nonunion workers and labor failed to recall Wisconsin's governor, Republican Scott Walker, after he signed a law limiting collective bargaining rights for most public workers.