SACRAMENTO — Freshman Assemblywoman Joan Buchanan, D-Alamo, has barely dipped her toes into the roiled waters of the Legislature but is already facing heat from Republicans — for a vote she didn't take. She and three other Assembly Democrats, all of whom won seats previously held by Republicans, did not vote on the first major piece of legislation that came their way: the Democrats' proposed $9.3 billion revenue increase as part of an $18 billion deficit reduction plan. The plan was approved by the Democratic-controlled Legislature but vetoed by Gov. Arnold Schwarzenegger, though the two sides are in the midst...