The big rally will apparently be outside Unity Elementary School in New Hampshire.
Though Barack Obama's campaign has yet to confirm the setting for his joint event Friday with former rival Hillary Clinton, MSNBC is reporting this afternoon that the secretary to the town selectmen says the Secret Service is "setting up shop" outside the school.
The Associated Press reported earlier today that several Obama campaign workers were measuring the school field, and that Chip Baldwin, the school's principal, said advance staffers showed up last week.
The guesstimates are that as many as 2,500 people will show up for the rally -- a crowd bigger than Unity's population of about 1,700.
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Glen Johnson is Politics Editor at boston.com and lead blogger for "Political Intelligence." He moved to Massachusetts in the fourth grade, and has covered local, state, and national politics for over 25 years. E-mail him at firstname.lastname@example.org. Follow him on Twitter @globeglen.