The power to impose tariffs is given to Congress in the Constitution. Exceptions are allowed but in rare and specific situations. The fact that SCOTUS struck it down means the tariffs as imposed were unconstitutional.

You can be for tariffs all you want, I'm not here to argue their efficacy. But you absolutely cannot with any intellectual honesty still be on the fence about whether he abused his power given this ruling.

It is not "flip flopping policy" to break the bounds of your Constitutional power and be shut down by one of the branches meant to check you.