Republicans Say GOP Needs Revamp After Romney Defeat

* Jindal, Walker, Graham aim to broaden party's appeal * Republicans must stop insulting voters, Jindal says WASHINGTON, Nov 18 (Reuters) - The Republican Party needs to stop insulting voters and broaden its appeal after Democratic President Barack Obama won re-election this month over Mitt Romney with overwhelming support from Hispanics, blacks and single women, top Republicans said on Sunday. Comments made by two leading Republican governors and an influential U.S. senator on Sunday reflected ...