odds of a meaningful majority.... 0%
Will Ditch do anything useful in the next two years? Not bloody likely.
Getting Harry Reid out of the drivers seat would be meaningful enough.
Perhaps - but it would still be at least some votes/no-votes that a Dim majority will surely screw us with. A gain is a gain - that's how the Left got the power to screw us so bad; taking it one little vote/edge at a time wherever they could. If we just throw up our hands and wonder what's the use, we might as well concede to the dark side and get the hell out of any political discussion/activity.