I’d like to note that, for now, this seems to be a uniquely American call:
Other conservatives agree, pointing to Paul’s Letter to the Galatians, in which the upstart self-proclaimed Apostle Paul describes a meeting when he called out Peter—the first Pope—for hypocrisy. To his face and everything. According to Paul, Peter backed down. Now traditionalists want to use this as a precedent for calling out the Pope when he’s not Pope-y enough.
Read the rest here. It is a good read, quick, to the point.