> This not accurate. Congress failing to act due to deadlock does not indicate that either party agrees that no change ought to be made, only that congress couldn’t come to an agreement about how it should be made.

That is actually literally what it means. The way the Union is set up, there is a certain amount of consensus necessary to pass legislation over 50 States across 300+ million people.

If there is a deadlock, then it's the system telling you that the consensus isn't met. In a Federal system, this means that the next best place to (try to) pass the law is at the State level, where you may have less of a deadlock.