This blog post talks about the potential harm to philanthropy that would come from a repeal of the Johnson Amendment, which prohibits religious and secular nonprofits from engaging in electioneering.

http://www.insidephilanthropy.com/home/2017/2/6/the-biggest-loser-from-repealing-the-johnson-amendment-wouldnt-be-the-democrats-it-would-be-philanthropy