The discussion should be more about whether we have set ourselves up for world condemnation as opposed to whether or not Trump was prevented in an absolute sense by the War Powers Act from doing what he did. As it is, we will not even give the Iranian Foreign Minister a waver so he can present to the UN in NY, a childish and shortsighted move on our part.
Trump and his gang have boxed themselves in on the score of credibility settling on this Imminent Threat claim that they can't even come close to proving. They just keep claiming that they based the assassination on an Imminent Threat claim and eventually claimed that they had forewarned the gang of 8 in that regard. Not one member of the 4 Dems of the gang of 8 recalls being briefed ahead of time and none of the Senators and Congresspeople in the post assassination briefing say the admin officials said anything about this Imminent Threat. So the administration has boxed itself into that corner all on its own and continues to speak in tongues to this day, 11 days later, which is stunning to me. This administration has run roughshod over the Congress for three years and now suddenly they think they need some story they can't support to make their argument!!!!
The issue should be that whether we like it or not, Soliemani was a government official of a sovereign nation we had not declared war upon. Yet we overtly assassinated him. I don't buy into this "yea but he was a terrorist" argument because one man's terrorist is another man's head of state. Ask the Panamanians after Bush 41 invaded Panama if they thought Bush was a terrorist. Ask the countless countries where we have engaged in assassination, coup d'etat and overthrow like the Northern Triangle countries what their take on that particular topic would be.
The point is not actually as much whether we do not have the means to assassinate, conduct coup d'etat etc but whether or not we take the additional step of doing it overtly, balls out. Because if countries are going to start balls out, overt assassination of the government officials of sovereign nations they have not declared war upon, all bets are off. Don't complain when somebody puts a bomb under your VP or a bunch of your Senators that are part of a ConDel because you will have given up your right to complain. We have the ability to conduct covert operations and while I am pretty opposed to regime change operations or assassination, we have government assets designed to conduct those operations covertly. To have overtly assassinated Soliemani seems to me just another bit of Trumpian bravado with no real benefit.
I don't consider it a benefit that the world believes we will conduct balls out, overt assassination of this type and I don't give a damn that Soliemani was a terrorist in this specific instance. There are other considerations more important than wagging your dick in the breeze. We already have Trumpean bar stool governance. It now appears that we are on from bad foreign policy to Trumpean bar stool foreign policy as well.