The end to the soap opera in South Carolina, liberals on the warpath in Arkansas, and California tea partiers seek to flex their muscles. Those are some of the storylines today as 10 states will go to the polls to choose party nominees.Charles Mahtesian of Politico has some races to watch, including the bellweather race for the Democratic primary for senate in Arkansas: With Democratic Sen. Blanche Lincoln's career on the line, this one easily rates as the day's marquee Senate contest. Sure, this race is about ambition - no one has ever described Lt. Gov. Bill Halter otherwise - but the real story of the runoff is in its implications for Democratic centrists across the nation. Fueled by progressive support, Halter's campaign accelerated from zero to 60 in almost no time, rapidly closing the gap on a well-funded, scandal-free two-term incumbent who carried the White House imprimatur. Whether Halter topples Lincoln or not - he had a slight edge in the most recent poll - the lesson many...(Read Full Post)