WASHINGTON — Montana U.S. Sen. Steve Daines, who is in charge of flipping the chamber from blue to red this November, said Tuesday he expects his home state will play a key role in ensuring a Republican majority come January. Daines, who is chairman of the National Republican Senatorial Committee, said that of the four toss-up states that will determine control of the Senate, he believes Montana is the most likely to choose a new senator over the incumbent, Democrat Jon Tester. “Of all of the states we’re currently battling, it’d be the most likely pick-up right now, if you graded on a curve,”…