A Famous person from Montana: Jeanette Rankin, the frist woman to serve in Congress.
And the only member of Congress to vote agaisnt the Declaration of War on Japan after Pearl Harbor. See http://en.wikipedia.org/wiki/Jeanette_Rankin (I know it's a publicly edited Encyclopedia, but I've read about a Republican Congresswoman from Montana being the only one to vote agaist that declaration in other places as well, so I'm sure that my above statement is correct).
She served two terms in the House. Amazingly that allowed her to vote against both World Wars. A few other people opposed World War I.
