Democrats now have two-thirds majorities in both chambers of the Legislature -- 29 of 40 seats in the Senate and 54 of 80 in the Assembly. But they will lose their supermajority in the Assembly in late April and most likely won't get it back for the rest of the year. Here's how a revolving door of departures and arrivals will wipe out the supermajority in the Assembly for the better part of 2013: Senate Democrats will retain their two-thirds majority even after two Democrats -- Sens. Gloria Negrete McLeod, D-Chino, and Juan Vargas, D-San Diego -- leave for Congress in early January. But Assembly Democrats will likely lose their two-thirds majority in late April because two of their members -- Ben Hueso, D-Chula Vista, and Norma Torres, D-Pomona -- are expected to win election to those vacant Senate seats. That would leave Democrats with 52 members in the Assembly -- short of a two-thirds majority -- at least until an early August special election. But it gets even more complicated: Another Assembly member, Bob Blumenfield, D-Van Nuys, is expected to run in the spring for the Los Angeles City Council. If he wins, his seat would become vacant on July 1, leaving Assembly Democrats three shy of a supermajority. Even if they regain the two seats vacated by Hueso and Torres in August, Assembly Democrats would be one shy of a supermajority until a special election is held in late October to replace Blumenfield.