How so? He is using the powers afforded to him by Congress. If congress wants to revoke those powers they are more than welcome to repeal the bills that allow him to do what he is doing.
If its a real national emergency he wouldn't have golfed for 3 days the next day.
If Trump can use these work arounds then Congress power of the purse is pointless, making the white house even more powerful and congress less so - which goes against co-equal branches of gov.
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