Get serious.
What does the Constitution have to do with what goes on in DC?
What you may be alluding to are procedures you don't understand that have their basis in legislative and administrative practices going back over the last two centuries.
It's not possible to understand it all ~ that's why the government's Second Tribune is a 9 member court (with numerous district courts) rather than just 1 guy.
The Constitution says simply that all appropriations and taxes have to BEGIN in the House. The Executive's ONLY Constitutional involvement is in signing Bills that've passed the House first, then the Senate and arrived at his desk.
The Democrats have gone to court many times to STOP schemes that allowed the Executive to dip into the Legislative prerogatives of the House. To the degree this scheme allows for that, it's already been tested several times in recent decades (against Republican Presidents).
I am absolutely startled that so many Freepers and the Blogs they read are so devoid of critical history.