Increasingly Likely: GOP Takes Senate

Not looking good for the Donkey Party.

All three major election forecasting models saw an uptick in the likelihood of Republicans winning the six seats they need to retake the Senate majority over the past week, movement largely due to the party's strengthened chances in Alaska, Colorado and Iowa.

The most bullish model for Republicans is Washington Post's Election Lab, which, as of Monday morning, gives the GOP a 76 percent chance of winning the majority. Leo, the New York Times model, pegs it at 67 percent while FiveThirtyEight shows Republicans with a 60 percent probability. A week ago, Election Lab gave Republicans a 65 percent chance of winning the majority, Leo put it a 55 percent and FiveThirtyEight had it just under 55 percent.

All three models give Republicans very strong odds of winning the open seats in Montana, South Dakota and West Virginia as well as beating Sens. Mark Pryor (D-Ark.) and Mary Landrieu (D-La.).  That would net Republicans five seats, one short of the number they need for the majority.