It was the IRS 501c3 Tax Exemption that was passed by Congress in the 1950's
against churches not to endorse a political candidate and take a political
stance, this thanks to LBJ, a Senator from Texas and succeeded JFK after
his assassination.
Strange, Black Churches are always allowed to be very political as long as
they favor left wing candidates. I heard of a case of a representative of
a Black Church in Memphis, Tennessee going into the Registrar of
voters and getting a whole lot of ballots for this past election, and got
them. This is unheard of in a predominate White Churches.
There was a Black Church that got into trouble in Mississippi with the media
for having a Trump sign posted outside their church, and the pastor
advising his congregation to vote for Trump because Hillary is just too
evil.