AP - Candidates snipe at each other, Clinton's voice catches on eve of NH primary ... Romney cites Obama's Iowa win as reason GOP voters should rethink a vote for McCain ... Campaigning takes a toll on Obama's voice ... Edwards shows no signs of flagging as he speaks on the trail ... Friends and foe descend on Giuliani as he campaigns ahead of NH primary ... Bloomberg presidential bid may hinge on bipartisanship among other candidates.More...