It’s been a fascinating 10 years.
After finding out, over the last 8 years, that Presidents are all-powerful and can not only enact laws unilaterally, ignoring the Constitution as they see fit, we NOW learn that Presidents are completely powerless and cannot rescind any law for any reason, because it would violate an unwritten part of the Constitution.
Yes, what you said.
because it would violate an unwritten part of the Constitution.
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Not merely unwritten but completely invisible - you need to use lemon juice to bring out the secret unwritten invisible writings of the founders.