Sunday talk show roundup: Republicans, Democrats spar over taxes, after fiscal-cliff compromise architect declares the tax issue "behind us." Top Democrats insist new tax hikes are the price for any spending restraint. Also: Nancy Pelosi says purge of conservatives will lead to better bipartisan cooperation. Plus: National Hockey League settles dispute, plans abbreviated season to start in two weeks. Markets: Corporate earnings to drive markets in the absence of Washington drama, at least for now.