One of the reasons for their misunderstanding was because of younger brother Justin. Kitty supported his decision to join the army whereas Nora was completely against it, especially after Justin was deployed to Afghanistan. From that point until Kitty's return to Los Angeles the two had barely spoken to each other. Until she returned for a visit for her birthday, Kitty had not been home in several years. She had been living in New York City, and witnessed the fall of the Twin Towers during the 9/11 attacks.
Kitty quit her job in New York as a radio host after she got the opportunity to be apart of the political show ("Red, White and Blue") in Los Angeles even though her then fiancé, Jonathan, didn't want her to do so. Unable to work things out, they broke up.
After the sudden death of her father, Kitty discovered, alongside with the rest of the Walker family, that her father had been cheating on her mother and had embezzled money from the company pension fund, putting the family business at risk.
Feeling betrayed and vulnerable, Kitty slept with cohost Warren Salter, furthermore complicating things with Jonathan, who wanted to reconcile with her. Soon after they ultimately decided it was for their best interest to break things up definitely. Jonathan then left back to New York. Kitty was therefore free to pursue an affair with Warren but he was hesitant as he was already involved with the young and feisty assistant Amber. Warren finally asked Kitty out. She accepted on the condition that he set things straight with Amber. When Kitty discovered that he didn't do so she realised they didn't have a future together.
When Kitty's brother Justin was called to fight in Iraq, she asked one of her guests, Senator McCallister, for his help concerning that matter but he refused. After another failed attempt to make him change his mind, Kitty apologized in front of her audience. Even though she admitted she had made a mistake, she didn't regret it and decided to leave the show. McCallister was nonetheless impressed by her frankness.
After much persuasion from Senator McCallister, Kitty became his communications director. Even though it was obvious that they were attracted to each other Kitty was reticent at first because of her recent misfortune with men and she wanted to take a "man fast", the two of them eventually started dating soon after. Most recently after the campaign helicopter that she and the Senator were scheduled to fly on crashed, Kitty asked Senator McCallister to marry her. Later the Senator proposed and Kitty accepted.