How is Atticus's conflict external or internal? to kill a mockingbird

Atticus has both internal and external conflicts in the book. There is the external conflict between many in the town who think that Atticus should not be defending Tom. The internal conflicts are much more interesting. Atticus really hopes the town will see past their bigotry but inside he seems to know he will lose the trial. There really is a long list of conflicts that Atticus must deal with but those are the main ones that spill over into others.