There is no chance the GOP will “fumble” this football ... This is about statistics and the rule of large numbers (or voters).
I have a similar feeling as you do about this...
I actually think this will happen, but nothing will actually change, or be done (correctively) with the country...
The republicans that are elected are too cowardly while in a majority, and feckless as a minority...
Damned if we do, and damned if we don’t...
You have more confidence in them than I do. Nate Silver estimates that the Republicans have a 59% chance of taking over the Senate. His track record is pretty good. 59% is not that great considering all the advantages they should have in this nonpresidential-year election.
Oh, they'll make the final cut alright, but just watch what happens when they hit the field.
Remember the article posted recently about the computerized voter turnout program that the Dems unveiled in the 2012 election. It has no doubt been extended and revised since then.
For example, you can bet that every single person enrolled in Obamacare with a government subsidy that makes it free will be contacted and told their coverage subsidy will be taken away from them by the mean old Republicans if they don’t get out and support Dem candidates.
The problem with this type of ground game in politics is that it is under the radar and may not be seen by the Republicans with the result that it cannot be countered effectively.