> I've heard that too, but how did the draft, Lend-Lease, and the build-up get passed through Congress before Pearl Harbor if there wasn't sufficient support?

Lend-Lease had fairly staunch resistance, as it basically shredded any pretense of neutrality. The draft and the military build-up were supported in large part due to neutrality--the need to have a sufficiently strong military to deter potential aggression (this was the strategy of Switzerland). When FDR extended the draft term from 12 months to 18 months, it passed by a single vote in the House.

My guess is that most people were already aligned with the Allies, and there was money to be made. I think the arguments for Germany were less of a "let's join Germany" and more of a "let's just not get involved", thereby seeding the European continent to Germany.

But, yes the US had a constant stream of arms being supplied to Britain and Russia during the period before the war.