By Tim Busch, National Catholic Register - When Joe Biden took the oath of office on Jan. 20, he became only the second Catholic president in U.S. history. The first, John F. Kennedy, was frequently and famously questioned over whether he was, in fact, a servant of the pope... With Biden, a different question must be asked, one that is focused less on the commander-in-chief and more on the Church: How will the Catholic hierarchy treat a president who rejects aspects of Catholic moral teaching?