You seem to be very confused about your US history. FDR was opposed to Smoot-Hawley, he ran as a free trade opponent of Hoover. In fact, FDR is the one most responsible for the myth that Smoot-Hawley caused the Great Depression.
FDR was a big-time progressive. He may have run against Smoot-Hawley, but he never intended to do anything about it, and his alphabet soup of Big Government agencies just made the Great Depression longer and deeper.