He has played 3 different historical American presidents; Gerald Ford in The Betty Ford Story (1987), Franklin D. Roosevelt in The Kennedys of Massachusetts (1990), Woodrow Wilson in The Young Indiana Jones Chronicles - Paris, May 1919 (1993) as well as 1 fictional president in X-Men: The Last Stand (2006).
There are two things that go on in a professional actor's life. The first is finding work, making a living, pursuing a career. The other thing is the art of acting. It's so easy to lose that in the urgency of a career. Sometimes the struggle is just staying active, when you wish the struggle would be over great roles and great plays. I'm not sure you ever reconcile the two things. I guess you just remind yourself that acting is worthwhile because there is always potentially great work to be done.