It has come to this. An impeached president -- still pending trial in the Senate -- orders the assassination of one of Iran's leading generals across the world where he is meeting with the leader of Iraq, a supposed ally. He does so without consultation, much less approval, of the Congress. Besieged at home, he lashes out abroad.

This president ran on the promise that he would end the "endless wars "in the Middle East. Earlier, he ordered and then wisely called off bombing strikes on Iran, saying that he did not want a war. Now he claims that he has acted to stop a war, not start one. He is either deliberately misleading the American people or he is deluding himself. Assassination of a foreign official is not the road to peace; violence almost inevitably begets violence. He has acted on what his own officials call "razor thin" evidence, shocking his own military advisers.

U.S. presidents now claim the right -- and have the capability -- of targeting and assassinating anyone in any place, foreigner or citizen, if they decide -- on the basis of secret and often scanty intelligence -- that person may be considering an attack on U.S. allies or soldiers or representatives sometime in the future. They call this potential threat evidence of an "imminent attack" to pay mock respect to the international law that they are trampling.

General Qassim Suleimani is portrayed as a terrorist with American blood on his hands. But he was not a stateless terrorist. He was a high official in a foreign government with which we are not at war. Assassinating him is an act of war. Ironically, Iran and the Shiite militias in Iraq that Soliemani guided were leading -- if unacknowledged -- allies in the fight against ISIS, who were largely Sunnis. Similarly, those who attacked the U.S. on 9/11 were Sunnis, almost all from Saudi Arabia, funded largely by Saudi money. The Taliban in Afghanistan are Sunni. The attack on Yemen is led by Saudi Arabia, which is Sunni. Iran fought against ISIS in Iraq and Syria. Yet, somehow, it has become Trump's leading target.

The road to this escalating conflict can be traced back to Trump's perverse hatred of all things achieved by Barack Obama. One of his first acts was to pull the U.S. out of the Iran nuclear pact, over the objections of our allies and his own military advisers. He ramped up sanctions on Iran, seeking to force them to surrender to a "better deal." The result has been escalating tensions and violence, as Iran has demonstrated -- in attacks on Saudi oil facilities and on tankers in the Persian Gulf -- that it has the capacity to strike back. Now, after the assassination, the entire region girds itself for the retaliation that has already been promised.

This is utter folly. Under George Bush, the U.S. destabilized this region with its invasion of Iraq. That calamity has fostered escalating violence across the region. President Obama added to the mess seeking regime change in Syria and in Libya, spreading the chaos.

Trump was right when he said it was time for the U.S. to get out of the Middle East. We have no stake in the spreading conflict between Sunni and Shiites. We have no desire to send the hundreds of thousands of troops needed to win a war or enforce a peace. All we are doing is squandering American lives and resources in an armed presence that simply adds to the violence without leading to a resolution.

Why has Trump abandoned his campaign promise? Why did he abandon his wise decision not to strike Iran earlier? The only thing that has changed is that he has been impeached. Is he ramping up violence abroad to distract from the overwhelming evidence of his offenses? Is he using the U.S. military as a political campaign prop?

The next move is now in Iran's hands. If the regime reacts predictably by striking back, Trump's assassination will lead to escalating violence. Eye for an eye, tooth for a tooth, and soon all are left without sight and without teeth. Iran could -- if its leaders can rise above their grief and their anger -- use this moment to take an initiative for peace, calling on our allies to join in convening a negotiation, opening a path that leads to less violence and greater exchange. Trump may not wish to respond, but surely our allies in Europe would jump at the chance.

Clearly Congress must assert its constitutional war powers and limit the license of this or any president to wage war -- or to assassinate foreign leaders -- on a whim. It must insist on public hearings that review the basis for the assassination. We need major hearings on what we are doing in the Middle East and how we begin to get the troops home. The Congress needs to pass a renewed war powers resolution instructing the president to bring the troops home, not send ever more of them to the region. If the Congress cannot curb a rogue president, then this Republic is in deep trouble. And the American people and its soldiers are headed deeper into wars without victory and without end.

You can write to the Rev. Jesse Jackson in care of this newspaper or by email at jjackson@rainbowpush.org. Follow him on Twitter @RevJJackson.