Democratic presidential candidate Sen. Bernie Sanders denounced President Donald Trump late Thursday night for giving the order to assassinate Iran's Maj. Gen. Qasem Soleimani, commander of the Islamic Revolutionary Guard Corps' Quds Force—calling the move a "dangerous escalation" that brings the United States "closer to another disastrous war in the Middle East that could cost countless lives and trillions more dollars."

"War with Iran would be disastrous and wholly unnecessary. Military and diplomatic leaders have warned it could bring costs, in both blood and treasure, greater than the wars with Iraq and Afghanistan combined." —Stephen Miles, Win Without WarIn a statement responding to what other critics decried as an "explicit act of war" by the sitting U.S. president, Sanders said, "Trump promised to end endless wars, but this action puts us on the path to another one."

Sanders invoked his vote against the U.S. invasion of Iraq in 2002 when he was a member of the U.S. House of Representatives during the Bush administration's push for war. "I feared it would lead to greater destabilization of the country and the region," Sanders explained. "Today, 17 years later, that fear has unfortunately turned out to be true. The United States has lost approximately 4,500 brave troops, tens of thousands have been wounded, and we've spent trillions on this war."

Sanders was hardly alone in his condemnation of what Trump has done by targeting and killing the powerful Iranian military leader—a figure many consider to be the second-most powerful person in the Iranian government behind supreme leader Ayatollah Ali Khamenei.

Sen. Elizabeth Warren, Sanders' rival in the 2020 Democratic primary, also railed against what she called a "reckless move" by the president—even as she deployed the widely derided "he was a bad guy, but..." construction.

Soleimani was a murderer, responsible for the deaths of thousands, including hundreds of Americans. But this reckless move escalates the situation with Iran and increases the likelihood of more deaths and new Middle East conflict. Our priority must be to avoid another costly war. — Elizabeth Warren (@ewarren) January 3, 2020

Numerous anti-war voices also spoke out forcefully against the U.S. escalation against Iran by Trump.

"Tonight, Donald Trump has driven us to the brink of war with Iran—and possibly further," said Stephen Miles, executive director of Win Without War, in response to the drone attack that killed Suleimani and other Iranian military officers with him.

According to Miles, "War with Iran would be disastrous and wholly unnecessary. Military and diplomatic leaders have warned it could bring costs, in both blood and treasure, greater than the wars with Iraq and Afghanistan combined."

Jamal Abdi, president of the National Iranian American Council (NIAC), also issued a grave warning. "The last thing the world needs is yet another disastrous American military adventure in the Middle East," said Abdi in a statement. "The assassination of IRGC Quds Force Commander Qassem Soleimani is a profoundly reckless move that will be viewed as an act of war in Tehran."

"Iran is a nation of 80 million innocent people," added Abdi, "most of whom do not want war and oppose the actions of their own government. Similarly, Iraq is a nation of 38 million who deserve peace after lives filled with war. And the American people have seen enough of wars in the Middle East that have no end, only new beginnings. Yet many thousands of innocents in each country will be the victims of a conflict that will be difficult to confine within any one nation's borders."

Artist, author, and progressive activist Molly Crabapple characterized what Trump has done as "idiotic, illegal lunacy."

SCROLL TO CONTINUE WITH CONTENT Never Miss a Beat. Get our best delivered to your inbox.





America just assassinated the top general of a country it is not at war with—and is most likely going to plunge not just us and Iran, but also Iraq into a bloodbath



Idiotic, illegal lunacy — Molly Crabapple (@mollycrabapple) January 3, 2020

Win Without War and other peace groups called on U.S. voters to immediately contact their members of Congress in order to avert further escalation and put a check on Trump's warmongering and illegal behavior.

Trump is leading the United States into an unnecessary and illegal war with Iran. Add your name now to tell Congress to act immediately and pull us off of the destructive path to war. https://t.co/aNxiPk847a — Win Without War (@WinWithoutWar) January 3, 2020 It's time to re-up our call & demand #NoWarWithIran.



Contact Congress & urge them to take all necessary steps to prevent a war and remind Trump that he does NOT have authorization for war with #Iran & must deescalate tensions TODAY.



Take action! https://t.co/OHE3b0J3on — NIAC Action (@NIACAction) January 3, 2020

Medea Benjamin, co-founder of the anti-war group CodePink, tweeted: "Let's be clear Trump is not responding to Iranian aggression. TRUMP IS THE AGGRESSOR. He is the one who tore up the nuclear deal that Iran had agreed to and adhered to. TRUMP IS THE AGGRESSOR. Period."

Miles made a similar point in his statement. "Make no mistake: Donald Trump is responsible for this crisis," he said. "Trump entered office with some of the most promising inroads to peaceful relations with Iran in decades. Instead, he proceeded to fill his cabinet with warmongers, abandon the successful, multilateral Joint Comprehensive Plan of Action (JCPOA), and launch a systematic campaign of 'maximum pressure,' placing the US and Iran on a collision course to conflict. Now, he has chosen to assassinate, without congressional authorization, one of Iran's most powerful leaders."

Rep. Ilhan Omar (D-MN) joined Sen. Tom Udall in calling for their fellow members of Congress to step in and put an end to Trump's military preemption and constitutional overreach.

So what if Trump wants war, knows this leads to war and needs the distraction?



Real question is, will those with congressional authority step in and stop him? I know I will. https://t.co/Fj9TMossEW — Ilhan Omar (@IlhanMN) January 3, 2020 President Trump is bringing our nation to the brink of an illegal war with Iran with no congressional approval.



Passing our bipartisan amendment to prevent unconstitutional war with Iran is urgent. Congress needs to step in immediately. https://t.co/tBFRwQMp51 — Tom Udall (@SenatorTomUdall) January 3, 2020

Other members of the U.S. Senate also chimed in.

"The president has taken a step that could very well lead to escalating warfare with Iran, and have profound consequences for American security," tweeted Sen. Jeff Merkley (D-OR). "The decision to go to war is given by the Constitution to Congress. The Constitution must be respected."

And Sen. Ed Markey (D-MA) stated, "Trump's apparent assassination of Soleimani is a massive, deliberate, and dangerous escalation of conflict with Iran. The President just put the lives of every person in the region—U.S. service members and civilians—at immediate risk. We need de-escalation now."