Louis Jacobson: “If you want your money to go as far as possible, Alaska’s Senate race—which is one of several competitive races that could determine control of the Senate—may be your best bet anywhere in the U.S.” “The state has three media markets, none of them bigger than 146th in the nation.” An on the House side, the best bet is Nebraska’s 2nd district: “This is one of four House seats on our list that are one-media-market districts, and it…