04/15/2012 04:33 pm ET

Connie Mack's Lackluster Senate Campaign Worries Republicans

With an iconic name and access to Washington cash, U.S. Rep. Connie Mack looked like the great Republican hope when he entered Florida's U.S. Senate race and posed a serious threat to Democratic incumbent Bill Nelson.

Six months later, however, Mack has proven to be neither a potent statewide candidate nor a shoe-in to win the Republican nomination against his little-known rivals.

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