On a recent rainy Sunday night, I added my umbrella to the stack outside the door of a Woodland Hills home and crept into the parlor to witness one small step in a revolution. Larry Greenfield, director of the 3,000-member strong Republican Jewish Coalition of Southern California, canvassed the Southland before the last presidential election, speaking to audiences and participating in debates -- including single-handedly taking on Zev Yaroslavsky and Rep. Brad Sherman at Valley Beth Shalom in Encino. But after President Bush kept the White House, Greenfield wasn't ready to rest. Feeding off momentum from a jump in the...