Responding to the president’s earlier tweet where Mr Trump wondered whether his predecessor was too soft on Russia, McCain wrote: "Yes, he was too soft - let's take a different course together: give defensive lethal assistance to #Ukraine & keep sanctions on #Russia."

As UNIAN reported earlier, Donald Trump emphasized that it had been during Barack Obama’s cadence when Russia "took" Crimea from Ukraine. In his tweet about the annexation, Trump asked: "Was Obama too soft on Russia?"