U.S. voters frustrated by competing claims of who will win the upcoming presidential election and why can turn to political science professor Thomas F. Schaller’s latest Salon column—“Why Obama/Romney will win/lose”—for insight on election theories. Schaller’s top theories for why Obama will win include: (1) He’s got a huge field advantage in the swing states. (2) No matter what Romney does, it all comes down to one state, Ohio—and Obama has it locked. (3) The Latino vote is being undercounted. (4) Cell phone users are being undercounted. (5) The 2012 electorate will look similar to 2008. (6) Nate Silver is …