The most clear-cut of those violations is the Bergdahl deal, because that came directly from Obama himself, and there isn't any question that it violated the law. The only response is "well yes, we broke the law, but we thought it was a good move so we did it anyway." Obama very clearly did not notify Congress as required because he was afraid of the political blowback. But being afraid that Congress and the American people might (with justification in this case) object to a prisoner exchange is not a valid excuse for ignoring the law.
