The logic is often far-fetched - how does medical marijuana affect interstate commerce? - and some conservatives would like judges to start throwing out federal laws wholesale on commerce clause grounds. The court once again said no thanks.
A gaffe is when a politician tells the truth.
Sometime they don't let you know that they know that they don't know...
I had a friend who was a clown. When he died all his friends went to the funeral in one car.