Obama just lost another one of his top advisers. His legislative affairs director has stepped down, creating challenges to passing the president's agenda in his final year in the White House, according to The Hill. Chief of Obama's legislative affairs operation, Katie Beirne Fallon is leaving after two years on the job. Fallon, a former aide to Sens. Harry Reid (D-Nev.) and Chuck Schumer (D-N.Y.), was instrumental in helping Obama score victories in trade, budget and Iran nuclear deal agreements last year. Obama called Fallon a "close adviser" and a "good friend," in a statement on Friday. "Republicans and Democrats...