Katherine O’Neill is a Jersey Girl and sometime Senate Staffer currently in the employ, according to Legistorm.com, of US Senator Ben Cardin (D-Maryland), which appears to be confirmed by her LinkedIn page: Current US Senate. Ms. O’Neill has worked in the Senate as a staffer previously, in both 2009 and 2010.
She was, (is?) also in the employ of OFA, and came to the Granite state where she claimed residence at 107 Penacook Street in Concord, New Hampshire, voted Democrat, and then left the state to return to DC. She was a professional campaigner, connected to the DC political machine of Barack Obama, who never had any commitment to New Hampshire beyond stuffing the ballot box with another liberal vote, then left.
So who actually lives at 107 Penacook Street in Concord, NH?

