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."

Yes, he was too soft - let's take a different course together: give defensive lethal assistance to #Ukraine & keep sanctions on #Russiahttps://t.co/2Su2wIiyWs — John McCain (@SenJohnMcCain) February 15, 2017

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?"