Here’s the real problem: As mentioned, in our recently completed February national poll President Obama had a 54 percent disapproval rating, but the generic ballot for Congress was only tied at 41 percent for Republicans and 41 percent for Democrats. Eighteen percent were undecided.

Among the undecideds for Congress, only 28 percent approve the job the president is doing, and 66 percent disapprove. In theory, by opposing President Obama, the Republicans have another twelve points available to them — getting them to as much as 53 percent of the national vote for Congress.

However, here’s a problem with the theory: In our poll 20 percent of all voters nationally disapprove of Obama but do not yet say they’ll vote to elect Republicans to Congress. These voters will decide the November election.

Among those who disapprove of Obama but aren’t planning to vote GOP, fully 36 percent are still voting for a Democrat for Congress. The other 64 percent remain undecided.

In other words, opposition to Obama is not a “silver bullet” strategy.