“In terms of procedure, is there anything in statutory law, which would prevent a follow-up piece of legislation next week?”
Trump can use a provision of the 1974 Congressional Budget and Impoundment Control Act to request Congress rescind specific items. He should start immediately taking this action - start with some truly outrageous items that are included in the 2000+ page monstrosity. Congress will then have 45 days to approve his rescission request or the money will be spent.
Time to mobilize the troops to inundate Congress with support for individual rescissions. Force Lyan Ryan and Malleable McConnell to get a spine and at least clear out the waste.
Could the "Paul Ryan Rescission Act of 2018" be passed with a mere majority in the house and senate, or would it require a 60-vote cloture vote?
What is the statute number of that provision from the 1974 act?
Would a "rescission act" apply to an "omnibus bill" (as if it were a "budget bill") within the 1974 statute?