Trump's eldest sons are backing a U.S. drone production company that aims to sell its tech to the Pentagon.
It’s the second vote in as many days, after the Senate defeated a similar measure along party lines.
The vote forced senators to take a stand on a war shaping the fate of U.S. military members, countless other lives and the future of the region.
Many Democrats are calling the operation illegal, saying the Constitution gives Congress alone the power to declare war.
