From the start, he promised Russia would pay "costs" if it persisted in trying to grab Ukrainian territory.
One Ukrainian soldier was killed and another wounded on Tuesday during a raid on a Ukrainian military base in the rebel Black Sea peninsula of Crimea, a Ukrainian defense ministry spokesman told AFP.
There's no longer any time to waste. Imposing personal sanctions that Russians laugh at isn't a cost.
History has shown how miscalculations lead to war, and Russian President Vladimir Putin needs to clearly understand what the United States won't tolerate from him.
It's put up or shut up time.