Obama issued out of an exec order to circumvent the legislative process after the original bill wasn't going his way.  By that token alone, Obama understood such a bill needed Congressional support.  But Obama decided the ends justified the means when he didn't get his way and made abused the law-making process.  I voted for Obama (twice) and made campaign contributions to elect him, but he consistently abused the legislative process when he didn't get his way and in doing so, he created a playbook/precedent for Trump to do the same thing.  It's a bitter pill to swallow, but it's our reality.