The opinion, contributions and candidate endorsements would only be coming from the pulpit not from the members of the congregation. Many members will not agree with the church, therefore the church would be falsely endorsing a candidate. Keep church out of politics. If they choose to be heard then they should not be tax-exempt which would lessen the tax load on all of us which would make an equal footing for us all. Remember, churches have members who all have voices. If a member including the priest/reverend/rabbi wants to endorse a candidate, then they should do so personally.