CAN SARAH PALIN pick up where Hillary Clinton left off? Palin wowed delegates with a confident, cutting speech aimed at hockey moms with a chip on their shoulder. She could have been singing along to Gretchen Wilson's "Redneck Woman" - "Some people look down on me, but I don't give a rip. I'll stand barefooted in my own front yard with a baby on my hip." It was great theater. But to John McCain, all that really matters is whether his running mate can pick up where Clinton left off and expand the GOP voter base.