The US Senate has voted 61-36 to kill the amendment, proposed by Senator Rand Paul (R-Kentucky) which would repeal the 2001 and 2002 Authorizations for Use of Military Force (AUMF) in Afghanistan and Iraq.

The Senate can’t repeal the AUMF without replacing it with a new authorization, said Senator John McCain (R-Arizona).

“It would mean that we would immediately need to start winding down” US forces abroad, said Senator Bob Corker (R-Tennessee), who also opposed Paul’s amendment.

‘Unlimited war’ and transgender troops: Amendments seek limits to military spending bill https://t.co/07Fb5JmVCM — RT America (@RT_America) September 13, 2017

Paul had vowed to delay the passage of the $700-billion dollar National Defense Authorization Act (NDAA) if he didn’t get a vote on repealing the AUMF.

“We have been there for 16 years. It is time for [the wars] to end. It is time for Congress to vote on whether or not they should end,” Paul said on Monday.

We have been there for 16 years. It is time for them to end. It is time for Congress to vote on whether or not they should end. — Senator Rand Paul (@RandPaul) September 11, 2017

The Kentucky Republican noted that his protest was for the soldiers, adding that “hypocrites” are happy to “pretend concern over our constitutional duty to declare war” but are happy to “block any vote on ending any of our 7 current wars.”

Where is the anti-war left demanding the wars end? Where is the constitional conservative right demanding Congress reclaim its war powers? — Senator Rand Paul (@RandPaul) September 11, 2017

A number of Democrats joined the Republican majority in sidelining Paul's amendment.

To fight the Islamic State (IS, formerly ISIS/ISIL) terrorist group, the Trump administration relies on authorization for the use of military force that was approved by Congress in 2001, shortly after the 9/11 attacks.

The measure was specifically designed to give the president powers to go after “those nations, organizations, or persons he determines planned, authorized, committed, or aided the terrorist attacks that occurred on September 11, 2001, or harbored such organizations or persons, in order to prevent any future acts of international terrorism against the United States by such nations, organizations or persons.”

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Last month, Secretary of State Rex Tillerson and Defense Secretary Jim Mattis told lawmakers the 2001 authorization provides sufficient authority to wage war against the Islamic State in Iraq and Syria.

Critics argue it’s a legal stretch at best, as the Islamic State group did not exist 16 years ago and that the US now uses the legislation to carry out military operations in Syria, Yemen, Somalia, Libya and other countries.

A separate authorization, which in 2002 approved the war against Saddam Hussein in Iraq, is also still in force.

The War Powers Resolution, enacted in 1973, prohibits US troops from being sent into combat for more than 90 days unless Congress has approved authorization for military force.

The war in Afghanistan, which began in 2001 as a US response to the 9/11 attacks, is the longest war in US history.