No takeover of the House has ever occured without taking over the Senate as well.
I sort of think that if the Republicans get within three seats of taking the Senate that they'll end up with four or five democrats flipping the way that wonderful RINO up in PA flipped democrat. I could be wrong, sure, but even if they don't flip, there's a good chance they'll be making like democrats did under Reagan and voting with Republicans in hopes of hanging on.
Regards