In Fall 2015, "a bill requiring disclosure of funders by any group spending $250 or more on an
In Fall 2015, "to further tighten Massachusetts campaign disclosure laws, Democratic representative Josh Cutler introduces a bill requiring disclosure of funders by any group spending $250 or more on an “electioneering communication” within 90 days of a Massachusetts election, including groups not registered as political committees."
Sources:
http://reclaimtheamericandream.org/progress-disclose/
https://malegislature.gov/Bills/189/House/H548