Yes, he was an America First guy in the 30’s and did not support getting into another European War, much like a majority of the American people.
When war came, he immediately applied for active duty to serve his country and was deliberately refused because of his opposition to FDR. It was vindictive.
I despise FDR. Statist POS. Many of the ills we face today can be traced back to him and his acolytes.