Are you saying that The Combine will support whichever candidate belongs to the party which will have the majority after election day? If so, that implies that it expects Republicans to hold on.
No, because if that were the case, Durbin would’ve been defeated. They will support the candidates that best serve their interests. Having a Democrat Whip and a stooge in the GOP caucus in their back pocket serves them (not to mention their greatest asset, Zero himself).