Rhode Island? Are they trying to keep out Canadians? 
Seriously though, I didn't think the upper New England states had problems with illegal immigration...I thought their train stopped at NYC.
Not even close. NH doesn't have as much of one because it's so damned difficult to get public assistance. Maine, OTOH, has a shitpot full of illegals and immigrants on the dole. One mayor got in hot water a while back because he told people to stop coming...(who was that, zeit?)
Boston has as many illegals as anywhere, and not just from Mexico/Central/South America. Try upwards of 50K Irish "southies", and Obama's auntie, for starters.