The fallout on the Hill from Carrick's switch to the Republican party exiles Josh deep into a White House doghouse, so C.J. gives Donna some tips on how she can support him; Jed gets a harsh reality check from C.J. when he lingers too long in a small Oklahoma town devastated by a deadly tornado; in Jed's absence, Leo juggles an impending war between Albania and Greece, a visit from the German chancellor, a tussle over tax cuts, and an over-reaching Secretary of Defense; Josh and Toby are less than thrilled when Leo brings Angela on board to assume some of Josh's responsibilities.