Sarah Palin has proved that she can draw a crowd. What she has yet to demonstrate is that she can translate the appeal of a phenomenon into a political force that can attract or mobilize sizable numbers of voters. The former Alaska governor is the Republican Party's biggest celebrity. She has given voice to a grass-roots movement grounded in anger with Washington and President Obama's policies. But her political future remains in question. Is she presidential timber? A force only within the Republican Party? A protest candidate like George Wallace (minus the racial divisiveness) or Ross Perot? --snip-- "Right now,...