I don't recall hearing about a declaration of war on Russia.It's interesting that both Mearsheimer, Hedges, and Chomsky make that same point, but i'm aware that they have to because of the need to be politically correct.
And so along with that goes the fact they all point out, that Russia was guaranteed no Nato advancement. As well as other justifications for Russia such as the Minsk agreement, and others.
Your mention of Russia being an aggressor won't be shunned by me! It affords the opportunity to tell a more complete story.
America is at war with Russia.