Strictly speaking, yes. Strictly speaking, invading a territory that is just a border away from the Atlantic Treaty's borders, with no clear indications that the advance will stop at any point, is very clearly 'akin to declaration of war', too.
He already spent so much of his money and so many of my nerve cells. Let the guy finish already, i dont want it all to be for nothing but hysteria and skyhigh prices on everything. We need results