(S (S (PP (VBN Based) (PP (IN on) (NP (BASENP (NNS sources)) (PP (IN among) (BASENP (JJ Democratic) (NNS operatives)))))) (COMMA ,) (S (NP (BASENP (NNP Jack) (NNP Cahill)) (PP (IN of) (BASENP (JJ American) (NNP Thinker)))) (VP (VBZ reports) (SBAR (S (S (NP (BASENP (JJ Democratic) (NNS tactics)) (PP (IN in) (BASENP (NNP Missouri)))) (VP (VP (VBP involve) (NP (BASENP (ADJP (RB actually) (VBG galvanizing)) (NN support)) (PP (IN for) (BASENP (NNP Santorum))))) (ADVP (RB ahead) (PP (IN of) (NP (BASENP (DT that) (NN state) (POS 's)) (BASENP (NNP Republican) (NNS caucuses))))))) (SBAR (SBAR (IN in) (NN order)) (S (VP (TO to) (VP (VB eliminate) (NP (BASENP (DT the) (NN possibility)) (PP (IN of) (BASENP (DT a) (NNP Mitt) (NNP Romney) (NN win))))))))))))) (PERIOD .))