the House and Senate allows them to set priorities and control what gets voted on...that leads to enormous frustration on the part of a significant portion of the voting public, and IMO is what's behind the low satisfaction level pointed out in the Quinnipiac poll.
Now...go look at the whole report I provided...the majority of American voters are displeased with virtually all of what Trump and the GOP have been doing...which translates into that majority "Possibly" flipping the House...and "Maybe" the Senate. This is also typical of Mid-Term elections when the minority party makes gains in Congress...i.e. not at all "Nonsensical"...