In the building code development process, there's a rule that any amendment to a proposal has to be deemed within the scope of the original proposal to be accepted. For example, I couldn't modify a proposal on basement wall design with an amendment on roof shingles.

A constitutional amendment placing that rule on congressional bills would fix a *lot* of problems. No more trying to poison a bill by hanging on a rider not relevant to the bill itself, but that you know will get it voted down.

-- Gary