Sen. Klobuchar's bill, which would take effect in 2012, is based on the rotating regional primary plan advocated by the National Association of Secretaries of State.  The country would be divided into four regions.  The states in one region would hold their primaries or caucuses on the first Tuesday at the beginning of March, and the other regions would follow on the first Tuesdays in April, May and June.  In the next election cycle the order of the regions would rotate.  Iowa and New Hampshire would keep their traditional first-in-the nation position (although Sen. Lieberman said that he disagreed on this point).  Sen. Lieberman noted that he has introduced similar legislation twice before, in 1996 and 1999 with then Sen. Slade Gorton (R-WA), but he said he felt this could be the right time to make a change.