President Barack Obama will return to the Seacoast on Friday, Sept. 7, bringing along First Lady Michelle Obama, Vice President Joe Biden and his wife Jill Biden. The entourage will make a campaign stop at Strawbery Banke Museum in Portsmouth.

Directly following the Democratic National Convention in North Carolina, the visit will be Obama’s third appearance in the area over the last few months. The president visited Durham in June and Rochester in August.

Both previous visits raised questions about who is responsible for covering the costs of a president’s campaign visit, and that question will come up in Portsmouth, too. The communities of Durham and Rochester incurred the costs of those visits.

New Hampshire is a contested swing state with four electoral votes at stake. Republican nominee Mitt Romney, too, has spent time in the Granite State, including a visit to Manchester with his running mate Congressman Paul Ryan in August.

The upcoming campaign stop will mark the first time a sitting president has visited Strawbery Banke since George Washington more than two centuries ago. The doors open at 10 a.m.