One issue that could motivate Reps (and Indies) is illegal immigration.
The Dems knew if they continued to keep the government shut down the Republicans would pound them by saying they favor Illegal Immigrants over the Military & Seniors & Citizens, etc. and they would be annihilated in the mid-terms.
Unfortunately instead of getting everyone mad the Dems, Trump and the Republicans came up with their own Amnesty plan and this new spending bill does nothing on the Wall and illegal immigration.
They need to run ads with Nancy Pelosi talking about Dreamers in select areas. The “select areas” point is important because its sells in some areas, notably CA.