Like I answered many times, there is no chance for Brazil to join the axis, and if the USA declares war on Brazil for some reason (like having bases in the northeast to invade vichy france like they planned on the
plan rubber), the brazilian government would instantly surrender to prevent a onslaught. There is no chance of resistence, there is no way to defeat them and there is no will to fight for that. Even the brazilian axis sympatizers, like Marshall Dutra and Francisco Campos just wanted Brazil to continue neutral in the war, because a country with a army of only one million, a fraction of the american industry and just two super dreadnoughts would have no chance against the United States.