I think the answer here is that all the above is legal until the PEOPLE OF THE US choose it isn't, by voting. In all the above cases the people of the US elected officials who were saying they would take such actions. That means the people gave up their rights to sell sawdust as meat, sell fake medical products, and implement racist policies.
Do remember, it's a democracy. The government by the people, for the people and all that. Not the people VS the government.
Do remember, it's a democracy. The government by the people, for the people and all that. Not the people VS the government.