In 1941, Japan declared war on the United States. Which branch of government would decide whether or not to declare war on Japan in return? Why?

on november 6 and 7, 1917 (or october 24 and 25 on the julian calendar, which is why the event is often referred to as the october revolution), leftist revolutionaries led by bolshevik party leader vladimir lenin launched a nearly bloodless coup d'état against the duma's provisional government.