Likely voters in California overwhelmingly support Proposition 13, according to a poll released this week by the Public Policy Institute of California. The poll also found that Californians believe they pay the highest taxes in the nation, and more than their fair share in state and local taxes. Proposition 13 was approved nearly 40 years ago with support of 64.8 percent of the vote, and the PPIC poll found that this support has not wavered. Asked if they believe Proposition…