Assuming there was nothing to gain, why might FDR simply dismiss the information indicating an attack?

December 7, 1941 began as a typical sunday for millions of American, but suddenly everything changed, irrevocably, in ways they would remember for the rest of their life

states

explanation:

as the old saying goes, all politics are local. state and federal governments affect our daily lives in numerous ways. yet, in our federal system, there is supposed to be a balance between federal and state power. as james madison envisioned it in federalist no. 51, “the power surrendered by the people” would be “divided between two distinct governments,” creating a balance of power that would enable the “different governments [to] control each other.”