Political Insider offers this post, which begins: “Senators Lamar Alexander, Amy Klobuchar, and Joe Lieberman have introduced a bill to revamp the presidential nominating process for the 2012 election. Their proposal, which can be read in full here, mandates a rotating series of regional contests. Each of four regions – East, West, South, and Midwest – would be assigned a month between March and June during which its states could hold primaries and caucuses. The month assignments would change every presidential election cycle. During any sixteen-year period, each region would get a turn at the leadoff slot. The three senators sponsoring the legislation believe this system could counteract what they call a ‘race to the front’ in the current scheduling of state primaries.” I’m not sure how this differs from the bill introduced by Rep. Levin back in May.