Please answer the following question: Facts: - birth name: gregory martin itzin - birth date: 20 april 1948 - occupation: actor - birth place: washington , d.c. , u.s. - yearsactive: 1979 -- present Based on these bullet points, write a short biography describing the life of gregory itzin .
A:
gregory martin itzin -lrb- born april 20 , 1948 -rrb- is an american film and television actor .he is best known for his role as disgraced u.s. president charles logan in the television series '' 24 '' .