Just a few days ago SoS Mike Pompeo said that we assassinated General Soleimani to stop an 'imminent attack' on Americans.
No evidence was presented to back up this claim. We are just supposed to believe it.

It turns out that Pompeo and VP Pence had pushed Trump hard to do this assassination.

Well, guess what? It turns out that Pompeo was a big fat liar.
The opposite was true. Soleimani was in Baghdad on a mission of peace.

The acting Iraqi Prime Minister Adil Abdul-Mahdi addressed Parliament today with a recommendation for U.S. troops to be removed from the country. That speech has been widely covered and quoted in the U.S. media but its most explosive revelations have been omitted or buried.

In the address, Abdul-Mahdi revealed that Soleimani had traveled to Baghdad to deliver a message back from Iran to Saudi Arabia about a proposal to lower tensions in the region, that Soleimani was to meet with the Prime Minister the very morning he was assassinated, and — most crucially — that days prior Trump had asked the Iraqi Prime Minister to “play the mediator’s role” between the U.S. and Iran.
...There can be no doubt that the Trump administration would have known in detail about Iran’s ongoing secret negotiations with Saudi Arabia, one of its closest allies, which were mediated by an Iraqi government, which was also operating closely and communicating frequently with Washington.

This means the Pentagon and the White House fully knew, when they ordered the airstrike to kill him, that Soleimani was traveling to Baghdad in a diplomatic capacity as an emissary of Iran, and that he had a meeting planned with the Prime Minister to discuss broader de-escalation.

So simply put: The entire Trump Administration is a bunch of big, fat liars that took a fig leaf of peace as an opportunity to start a war, and then told us the opposite.

So you already know Trump's lie about this, and you already know Pompeo's lie.
What about Pence's lie?

Pence, in a wide-ranging Twitter thread detailing Soleimani’s alleged crimes against America, claimed Soleimani “assisted in the clandestine travel of 10 of 12 terrorists who carried out the September 11 terrorist attacks.”

The tweet drew immediate criticism, in part because it is factually incorrect. Pence wrote that there were 12 terrorists who attacked the US on 9/11, but there were actually 19 hijackers.
...Similarly, the 9/11 Commission Report found “8 to 10 of the 14 Saudi “muscle” operatives [those assigned physical tasks in the hijackings] traveled into or out of Iran between October 2000 and February 2001,” but clearly states that neither the Iranian government nor Hezbollah helped facilitate the attack. Page 241 of the report reads:

We have found no evidence that Iran or Hezbollah was aware of the planning for what later became the 9/11 attack. At the time of their travel through Iran, the Al Qaeda operatives themselves were probably not aware of the specific details of their future operation.

For those people who think impeaching Trump will fix everything, Pence would be even worse.