Let us call a spade, a spade. Donald J. Trump does not have what it takes to be the representative of his country on the international stage because he does not possess one iota of emotional intelligence. The result is that he thrashes around like a bull in a china shop making things worse with every movement he makes, the US version of Pussy Riot.
The answer to the question of Russia's retaliation to USA's sanctions is becoming clear. It goes about the bill that Russian MPs have been working on lately. It has become known how exactly Russia may response. To be more precise, it goes about two issues - limiting cooperation in outer space and stopping the supplies of Russian spare parts for Boeing