Republicans control the House
You're not going to find many John Boehner fans here my friend. Nothing had ever been initiated or attempted to put foward anything that would stop him from the House. Never even made any attempts. The House CONTROLS the purse strings.
For that reason alone it's unlikely we will win the Senate.
The other reason is: crowds of Republicans will not be rushing to the polls to vote for a Mitt Romney. Those that stay home (and there will likely be many) will of course not be voting for Senators and Representatives.