Wary of Tea Party, GOP Attacks Senate Candidate

WASHINGTON (AP) -- Delaware Republicans call Senate hopeful Christine O'Donnell a liar who ''could not be elected dog catcher'' in a fierce attack that underscores GOP fears of the tea party-backed candidate knocking off top recruit Rep. Mike Castle and winning the nomination.

Stunned by tea partier Joe Miller's upset of Alaska Sen. Lisa Murkowski, Republicans are taking no chances in Delaware, which holds its primary Sept. 14. The party sees Castle, the state's lone congressman since 1993, as the best candidate for the seat long held by Vice President Joe Biden.