Daniel Day-Lewis as....Walt Disney?!?

Daniel Day-Lewis looks and sounds incredible (as always) in the trailer for "There will be Blood," the new movie by Paul Thomas Anderson based on Upton Sinclair's novel "Oil!" Where did he come up with his unique vocal cadence and tone for the movie? I couldn't figure it out, but I knew it was something specific. Then it hit me. Listen for yourself and tell me if I'm crazy!