Northern Ireland would need to approve the move in a referendum.
There are no specific or credible threats against New York City at this time, but officials are taking additional precautions because of the significance of the Sept. 11 anniversary and ongoing concerns about antisemitic threats.
The White House shared no proof the incident occurred.
Oil prices on Wednesday jumped more than 3%.
The aides received the gifts in addition to their six-figure salaries.
"I have fought for as long as I can," Bunch told ABC News.