captions by vitac www.vitac.com major new backing and a brewing new controversy for the republican presidential candidate mitt romney. he s picked up one of the most sought-after endorsements of the campaign, but a remark by one of his top aides is now threatening to overshadow it. our national political correspondent jim acosta is with romney who is holding a town hall meeting outside baltimore. jim, what happened? reporter: wolf, as you just mentioned mitt romney is about to hold a town hall meeting just outside of baltimore. the maryland primary is coming up in about a week and a half, but mitt romney can take comfort in the fact that rick santorum s path to the nomination looks sketchy today, but as the romney campaign knows, this race for the gop nomination is not etched in stone. thank you. reporter: it was as if one of the biggest names in republican party politics was listening to mitt romney s call for unity after the illinois primary. join us. join us.