What makes you think the republican voters want the Senators to do anything. Being The Party of No is working for them thus far.
Oh sure .. republicans are in great shape.

.. on Uranus maybe .. but here on earth the Republican Party is a imploding disaster .. and it's only going to get worse.
56% of state representatives are republicans; 56% of the governors are republicans; the GOP controls both houses of Congress. The GOP isn't going anywhere no matter what you think.
Sure:0)
Republicans have lost virtually every social issue they cherish ... and the evolution of America does not suggest a bright future for an all white political party in America.
Doesn't matter though. The GOP controls the majority of things other than the WH. They are not spiraling the drain by any stretch of the imagination. It has been a flaw of the DNC as long as I have been alive. There are man y places the DCCC/DNC doesn't provide any real support to candidates unless the seat is open or the candidate has basically already won it on their own by their own hard work. They spend too much money on show pony races and big blue areas, and the WH instead of developing, promoting, and funding down ticket candidates. They largely have written off the South and Midwest even though there are a lot of solid performance districts in those places because even if their candidates win, they are not liberal enough for their liking.