Concord, New Hampshire (CNN) - Vice President Joe Biden will visit the first-in-the-nation primary state Thursday to file for President Barack Obama's candidacy in the state's presidential primary, according to the New Hampshire secretary of state's office.
A Democratic source in Washington confirmed plans for the vice president's trip.
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The filing period for presidential candidates began Monday and runs through Oct. 28.
Republicans Ron Paul, Jon Huntsman and Fred Karger all filed Monday. The filing fee is $1,000.
Four years ago Biden filed paperwork for his own candidacy for president in the same office in New Hampshire's statehouse.
The secretary of state has yet to set a date for the New Hampshire primary, but has warned votes could be held in early or mid-December after other states moved up the dates of their nominating contests.
–CNN's Paul Steinhauser contributed to this report.