Not really. Most Americans were quite sympathetic to the allied side before the US's entry into the war. Only very few Americans legit believed that the US should arm the Axis powers and even fewer (around 2%) believed the US should join the war on the Axis side. I got that source from back in 2004, I would swear it was from Medal of Honor: Pacific Assault, but I cannot be sure.
Most of the people at least believed that the US should only be supplying the Allied side at least.