Nate Silver has built a brand as a successful prognosticator of U.S. elections — and fantasy baseball projections, for the record. So Democrats are understandably concerned about his prediction that Republicans will regain the U.S. Senate in 2014. The Huffington Post writes:

Cue the hand-wringing in Democratic circles everywhere: Nate Silver says the GOP will probably re-take the Senate in November’s elections.

After he ran the table in 2012, correctly predicting the electoral outcomes in every single state, Silver has become something of a modern-day oracle to political junkies.

On Sunday, Silver took to his new FiveThirtyEight website—and his new TV home on ABC—to deliver one of his breathlessly awaited prognostications.

Republicans need six seats to regain control of the Senate chamber. How many seats did Silver think the GOP would win? “Exactly six,” he told ABC’s Jonathan Karl.

Silver gave Republicans a 60 percent chance of wresting the Senate out of Harry Reid’s hands—a big blow to the final two years of the Obama presidency. In Silver’s words, that only makes the GOP “slightly favored” to win, and there are still very many months to go until November.