Sen. Hiram Monserrate has switched sides—again. Monserrate stunned the New York’s political establishment and paralyzed the legislature a week ago when he rebelled against his own party and voted with fellow Democrat, Sen. Pedro Espada, Jr., of the Bronx, to hand control of the Senate to the Republican minority. On Monday, the mercurial Monserrate returned to the Democratic caucus—without Espada. His decision creates an astonishing 31-31 deadlock in the Senate and further muddles the question of which party controls that body. [includes rush transcript]