The revolution of the G.O.P. became more apparent last night with party insurgents winning in the latest batch of primary races, the New York Times reported. "Dissident" Republican Christine O’Donnell beat moderate Michael N. Castle to replace Joe Biden’s Delaware Senate seat, leading strategists in that state to lose some faith in the Republican Party’s chances for the seat in the general election. “There’s just a lot of nutty things she’s been saying that just simply don’t add up,” Republican Karl Rove said. “In my opinion, this is not a race we’re going to be able to win.”

In New Hampshire, Republican Ovide Lamontagne is neck-to-neck with his more moderate rival, Kelly Ayotte, in the state’s race for Senate; the results had not been called as of this morning. Ayotte spent more than four times the amount Lamontagne spent in their respective campaigns, and had the support of mainstream Republicans, according to CBS News. Lamontagne, on the other hand, sees himself as an extreme Republican and won Tea Party support at straw polls leading up to the primary. "You can’t get to the right of me," he said of his extreme conservatism. These results are largely symbolic of the Tea Party’s infiltration of the GOP, the Times said.

The U.S. Food and Drug Administration will within months release new restrictions on what antibiotics farmers can use on animals, and for what reasons, the New York Times reports. Over time, medical experts have become more and more adamant that the use of these drugs increases the strength of antibiotic-resistant bacteria strains in humans, including E. coli. The new rules will prevent using the drugs for animal growth and would call for more thorough oversight by veterinarians. Scientific groups like the American Medical Association are asking for stricter regulations, as in barring the use of antibiotics in healthy animals completely, the Times reports. Livestock producers argue the link between alleged human diseases caused by antibiotics in animals is not strong enough to merit these restrictions.