The flipside to "compromising the gospel for the sake of being politically correct" is being overly critical of those in civil leadership because we don't want to be politically correct. Whether to be politically correct or not should never be the measure of our posture toward unbelievers. We are to be kind to each other, pray for those with civil authority, and live in peace with everyone.
Pastors are not "living in peace" when they criticize civil authorities from the pulpit. They shouldn't be using their position to politic. Their charism is to equip the saints for ministry and discussing politics, especially ranting about all the things they don't like about this or that, does nothing to equip anyone for ministry.