Let's look at the "worst" president and mismanagement claims.Link
FDR led us into World War II. Germany never attacked us: Japan did. From 1941-1945, 450,000 lives were lost, an average of 112,500 per year.
Germany declared war on us shortly after Japan attacked Pearl Harbor.
As for direct attacks, on 31 October 1941 a German sub attacked and sank the Reuben James in the North Atlantic. You can look it up. There's even a song.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.