Senator Bernie Sanders of Vermont, his presidential campaign now behind him, will look to advance the movement he built during the Democratic primary race, with the public unveiling on Wednesday of a political organization focused on addressing economic inequality and taking on special interests.
But while the establishment of the new group, Our Revolution, has been eagerly awaited by many of his most ardent supporters, it has been met with criticism and controversy over its financing and management.
A principal concern among backers of Mr. Sanders, whose condemnation of the campaign finance system was a pillar of his presidential bid, is that the group can draw from the same pool of “dark money” that Mr. Sanders condemned for lacking transparency.