COLORADO SPRINGS-- U.S. Senate candidate Andrew Romanoff, Colorado’s former speaker of the house, a popular political figure by almost any measure, won the Democratic Party county assemblies by 16 points last month and polls well against GOP challengers Ken Buck, Tom Wiens and Jane Norton. Yet his primary campaign against appointed Senator Michael Bennet has floundered, leading observers to continue to ask why he's running and to search his campaign literature, his speeches and his face for motive.