NEW YORK (Reuters) - Standard & Poor's on Friday raised the pressure on debt negotiators in Washington, saying it could downgrade insurers, securities clearinghouses, mortgage agencies and a laundry list of other firms without a deal soon to lift the debt ceiling and cut the deficit. (http://feeds.feedburner.com/~ff/reuters/topNews?d=yIl2AUoC8zA) (http://feeds.feedburner.com/~ff/reuters/topNews?i=14qN_3ta9oM:M_jdm58ZAPc:V_sGLiPBpWU) (http://feeds.feedburner.com/~ff/reuters/topNews?i=14qN_3ta9oM:M_jdm58ZAPc:-BTjWOF_DHI) (http://feeds.feedburner.com/~r/reuters/topNews/~4/14qN_3ta9oM)