More than US$20 billion per year in giving is potentially at stake.
A provision in the House's pending tax bill would let religious and secular nonprofits engage in political speech without facing a penalty.
President Trump claims that churches suffer from the over-regulation of their political speech. In reality, oversight is lax for religious groups and secular tax-exempt nonprofits alike.
The Johnson Amendment requires houses of worship to stay away from politics to receive tax exemptions. Yet, their leaders can speak out in a variety of ways that could reflect their religious views.
President Trump recently repeated his pledge to eliminate the 63-year-old law, which bans charities from engaging in political activities, at the National Prayer Breakfast.