On January 27, U.S. District Court Judge Janet C. Hall enjoined Connecticut’s ban on out-of-state circulators. Libertarian Party of Connecticut v Merrill, 15-cv-1851. The 17-page opinion says “the Party is substantially likely to succeed on the merits of a facial challenge to the statutues at issue”, so even though a final decision on constitutionality has not been issued yet, in the meantime anyone from outside Connecticut may work, and the signatures cannot be invalidated just because the circulator is not a Connecticut resident.
The ACLU handled this case. UPDATE: here is a news story.