Bipartisan Support, With Caveats, for Obama on Iraq Airstrikes

President Obama drew bipartisan support on Friday from members of Congress for his decision to authorize military strikes in Iraq, but the backing was tempered with substantial concern — including within Mr. Obama’s own party — about his strategy for the operation.

Republicans suggested that the administration had acted too slowly and timidly to confront the Islamic State in Iraq and Syria, or ISIS, and now was moving too cautiously against the group. Some said he should not rule out ground troops.

Speaker John A. Boehner of Ohio accused the...