Could you please separate (a) possible FDR foreknowledge of the Pearl Harbor and probable/likely denial of that information from Kimmel/Short, and (b) FDR's rationale for US entry into WWII? [End depression, help UK, ..., etc.]
Thank you.
The tactic of warning Kimmel without the detailed "background" of the intelligence is what left the commander on the scene(Kimmel) without the latitude to command creatively.