That's what runoffs are for, should the Senate be deadlocked, in La or Ga. Either 49-50 or 50/50. We don't anticipate losing both.
Really? That's strange, since historically in Southern runoffs minority and young turnout has dropped off significantly -- especially in Georgia (less so the case in Louisiana). In both races, most likely if it goes to the runoff the Republican has won.
As for the topic of the thread, I'm confident that if it's January 2015 and the Senate is deadlocked, King will side with the Democrats -- while the potential for gains is overstated, 2016 is likelier to see Democratic than Republican gains in the Senate, and King wouldn't want to upset the likelier future majority party (that and he's ideologically a good deal closer to the Democrats anyway).