Massachusetts Attorney General Maura Healey and U.S. Rep. Jim McGovern, both Democrats, are throwing their support behind a ballot question to create a commission to advocate for a constitutional amendment overturning Citizens United.

The ballot initiative is a project of American Promise, a Concord-based national organization aimed at getting citizen support for a constitutional amendment to overturn the Supreme Court's Citizens United ruling.

According to American Promise, Healey and McGovern will headline a fundraiser for the effort at Democracy Brewing, a Boston brewery, on Wednesday evening, Aug. 1.

Admission is free, although attendees are encouraged to contribute.

The 2010 court decision allowed corporations to spend unlimited amounts of money supporting or opposing a candidate as long as they did not coordinate directly with the candidate.

The ballot question, which will be Question 2 on the November ballot, would create a 15-member Citizens Commission to research, report and make recommendations to assist in drafting and promoting a constitutional amendment.