I think predominantly African-American churches are exempt from IRS prohibitions against political campaigning during services.
Ha. No, I was thinking theologically. In Judaism, we pray for the leaders of the nation we are in, to be wise, follow G-d, etc.
Dates back to the Babylonian captivity (and was quite shocking, given the anger at being taken as a captive).
Other than that, the service is generally devoid of politics.