This is a drastic escalation. The US is plainly assassinating top Iranian military leaders in a capital city. This could definitely count as a declaration of war.
Will Benedict Donald's Russian owners benefit?
If you knew anything about geopolitics, you'd know that the answer is a clear no. Iran has been crucial for Assad's survival.
That overlooks the rising oil prices, another potential European refugee crisis, along with possible political destabilization and rising isolationist sentiment in the United States.