"Back in the day", as it were, persons who entered new marriages subsequent to annulments were asked to celebrate the new marriage in a low key way and to live their Catholic and sacramental lives without drawing attention to themselves. The reason profered was usually that the couple should avoid giving scandal. We liberals sometimes interpreted those guidelines harshly, thinking that the church was treating the couple as "second class citizens". However, another way of understanding the guidelines was that they were an attempt to respect the feelings and sensibilities of the innocent victims of the failed marriage(s). The Gingriches hurt a lot of people en route to their eventual marriage and reconciliation with the church. Cardinal Wuerl's participation is a text book example of the sort of scandal the old rules tried to contain.
I mentioned elsewhere that Trump, Giuliani and Gingrich bring a total of nine wives to the Republican family values party. Bannon brings three more.