On Bloomberg TV's "Market Makers," Mark Halperin and "With All Due Respect" guest co-host Campbell Brown dissect this weekend's Iowa Freedom Summit and a private donor event for the Koch political network. The number-one topic: Wisconsin Governor Scott Walker's well-received performance in Iowa, and whether it will help him stand out among other contenders vying for the Republican nomination. They also discuss how Carly Fiorina fared, and whether Florida Senator Marco Rubio scored points with his message about the economy. Let the GOP games begin!
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