The story of a young Russian-Jewish mouse who emigrates to America, is separated from his family, and has to find his way in 1880s New York City is a lushly-animated, sometimes grim story about assimilation, discimination, and the promises the United States makes to the world and consistenty violates. 

Starring Cathianne Blore, Dom DeLuise, John Finnegan, Phillip Glasser, Amy Green, Madeline Kahn, Pat Musick, Nehemiah Persoff, and Christopher Plummer. Written by Judy Freudberg and Tony Geiss. Directed by Don Bluth.

https://sites.libsyn.com/398906/episode-225-an-american-tail-1986