the US knew about the Japanese wanting to bomb Pearl Harbor

Cordell Hull (SecState) and Roosevelt wanted them to do it.

US Ambassador Joseph Grew sent Hull a message that basically amounted to "WTF ARE YOU MADMEN DOING?!" (in a lot more words) after they snubbed Fumimaro Konoe's negotiation attempts. Grew realized that Hull wanted the Konoe government to fail, so they'd get Tojo who would give them the war they wanted. Grew was furious about being led on by Washington and went to Hoover with a tell-all.

the US knew about the Japanese wanting to bomb Pearl Harbor

Cordell Hull and Roosevelt wanted them to do it.

US Ambassador Joseph Grew sent Hull a message that basically amounted to "WTF ARE YOU MADMEN DOING?!" after they snubbed Fumimaro Konoe's negotiation attempts. Grew realized that Hull wanted the Konoe government to fail, so they'd get Tojo who would give them the war they wanted. Grew was furious about being led on by Washington and went to Hoover with a tell-all.