NASHUA, N.H. – President Obama arrived in this northeastern swing state for the second time in nine days and quickly made a pit stop at a Teamsters office in Manchester.

A group of about 60 members greeted the president with loud cheers and chants of “fired up, ready to go!” Obama addressed the group briefly, telling them the state will be “very important” on Election Day on Nov. 6.

“We don't know how this thing is going to play out,” Obama said. “These four electoral votes right here could make the difference."

Obama won New Hampshire by 9 percentage points in 2008, but polls show the race tightening here. The New Hampshire Union Leader, the state’s most prominent newspaper, endorsed Republican Mitt Romney.

Before leaving the Teamsters office, the president listed his accomplishments, including protecting equal pay for women, and he added: "I'm going to need you guys over the next 11 days to work as hard as you can. Do it not for me, do it for your kids."

Obama is scheduled to speak at a campaign rally in Nashua at 2:15 p.m. Folk singer James Taylor warmed up the crowd ahead of the president’s arrival at the outdoor event.