First Lady and First Gentleman were unofficial titles for the spouse of the President of the United States and the presidents of certain other countries. Many served as a figure-head for diplomatic relations, as observed in the relationship between First Ladies Martha Logan and Anya Suvarov.
Allison Taylor, David Palmer and Charles Logan were all divorced from their spouses. Coincidentally, all of the divorces ensued due to various acts of distrust and government cover-ups. David broke up with Sherry Palmer due to her dishonesty and sociopathic behavior; Charles was divorced by Martha due to his abuse of her and other illegal actions on Day 5 and Allison was divorced by Henry after she refused to cover up the illegal actions of their daughter Olivia.