Generally, in midterms, when the President has an approval rate at 50% or better, then the President's party in Congress tends to fare better than is usual in midterms.
Recently, The Obama Total approval is at 49% and is not at 43% according to Rasmussen. That would be an uptick.
"Crow, James Crow: Shaken, Not Stirred!"
(Great Half-Wit Father In Washington Finally settled on "Black," maybe Las Vegas style after all(!)! Hmmm! McCain From Red Rocks Of Sedona Teepee: Called California Senator Black. . .or Maybe Asian. . . .or Maybe Moslem. . . .or maybe woman candidate for office in New York! GOP. . . Now Take Tea. . . And P. . .Well(?)!)