Obama opens door to 'limited' ground combat operations against ISIS

President Obama on Wednesday opened the door to "limited" ground combat operations against the Islamic State, as he asked Congress to formally authorize military force against the terrorist network.

The president, in a proposed resolution and a letter to Congress, underscored the "grave threat" posed by ISIS.

"If left unchecked, ISIL will pose a threat beyond the Middle East, including to the United States homeland," Obama said.

The proposal includes limitations that would bar "enduring offensive ground combat operatio