Will Gillibrand be able to balance Senate work, campaign trail?

WASHINGTON — Since she can't be two places at once, Kirsten Gillibrand's quest for the Democratic presidential nomination will necessarily draw her away from the job for which she was elected: U.S. senator from New York.How much time she'll spend on the presidential trail, how much Senate business and votes she'll miss, and how she'll achieve balance are all questions that remain up in the air as she prepares to travel Friday to New Hampshire for a weekend of campaigning — her first