WASHINGTON (AP) — President Barack Obama says he wants to work with Congress on a new authorization to use military force against the Islamic State group.

Obama says the world needs to know the United States is united behind the effort. He says U.S. military members deserve their government’s clear support.

Previously, the White House has cited Congress’ 2001 authorization to wage war on terrorists responsible for 9/11 as legal grounds for its airstrikes against IS in Syria. The Obama administration has also cited the invitation from Iraq’s leader for the U.S. to strike IS targets there.

Passing a new authorization would mark a new chapter for U.S. military engagement in the Middle East.

Obama spoke the day after midterm elections, in which his party suffered heavy losses and Republicans seized the Senate.

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