To my knowledge, there was only one high-ranking politician who spoke out against internment of Japanese-Americans in concentration camps: Governor Ralph Lawrence Carr, who said:
“If you harm them, you must harm me. I was brought up in a small town where I knew the shame and dishonor of race hatred. I grew to despise it because it threatened the happiness of you and you and you.”
http://en.wikipedia.org/wiki/Ralph_Lawrence_Carr
He lost his next election.
I did not know that. Thanks for that history lesson.