*The big focus tomorrow is the evening’s vice-presidential debate in Danville, Kentucky. Vice-presidential debates rarely matter much, though there are signs that this one could be more fun. Vice President Joe Biden is occasionally gaffe prone but combative — and experienced in foreign policy. Romney running mate Paul Ryan is equally aggressive. Michael Tomasky blogs on thedailybeast.com that “Biden has been swinging at Romney and Ryan for months now, sometimes missing but sometimes landing the best punches of any Democrat.” Expect fireworks.