Who wins? Depends on the issue being discussed. If democrats can keep things focused on the destruction the republicans are causing in science, safetynet, and environment, and also on how much of a disgrace Trump is = they will win one house of congress and come close in the other. If the democrats go back to the anti-male metoo crap at that time = they will lose both houses! Republicans may gain a few more seats to pad their majority in the senate.