And the un-patriotic unions struck during the war.
Technically no, the US is not at war in October of 1941. As I understand it both the AF of L and the CIO signed no strike pledges after Pearl Harbor. However the UMW did have some labor unrest even during the war, but most of the big unions were quiet.
Besides, during the war, you had wage and price controls in place that made a strike over pay a non issue.
It was after the war, when the big industrial unions started to flex their muscle.