Remember back years ago when movies would move a bit slower, and show things like character development, or sometimes start a character (or two!) off as cranky, just to slowly peel back the layers of the onion?
Guarding Tess remembers.
As the movie opens a quirky, salty former First Lady, Tess, and her favorite Secret Service agent, Doug, have a mutually antagonistic relationship, though she clearly holds the upper hand. As the movie plays out, we learn more about her, but very little about him. He, and most of the other agents, feel it's a boring assignment and wish they were where the action is, protecting the current President.
The story plays out well, showing Doug's compassion at a difficult time reciprocated by Tess wanting him around. Nice point and counterpoint.