President Obama has put America at the center of a widening war by expanding into Syria airstrikes against the Islamic State, the Sunni extremist group known as ISIS and ISIL. He has done this without allowing the public debate that needs to take place before this nation enters another costly and potentially lengthy conflict in the Middle East. 

He says he has justification for taking military action against the Islamic State and Khorasan, another militant group. But his assertions have not been tested or examined by the people’s representatives in Congress. How are Americans to know whether they have the information to make any judgment on the wisdom of his actions? 

There isn’t a full picture — because Mr. Obama has not provided one — of how this bombing campaign will degrade the extremist groups without unleashing unforeseen consequences in a violent and volatile region. In the absence of public understanding or discussion and a coherent plan, the strikes in Syria were a bad decision.