A House divided along unusual and unpredictable lines voted Wednesday to authorize the training and arming of Syrian rebels to confront the militant group Islamic State, backing President Obama after he personally pleaded for support. The 273-to-156 vote was over a narrow military measure with no money attached, but it took on outsize importance and was infused with drama. Speaker John A. Boehner of Ohio and Representative Nancy Pelosi of California, the minority leader, actively and strongly backed the legislation, and both sought to portray it as a modest measure. The Senate hopes to pass it as soon as Thursday. “The American forces that have been deployed to Iraq do not and will not have a combat mission,” President Obama said Wednesday in addressing troops at MacDill Air Force Base in Florida. “I will not commit you and the rest of our armed forces to fighting another […]