Is he drawing another line in the sand?
Check it out:

The Obama administration has accused Russia of violating a 1987 nuclear missile treaty by testing a new ground-launched cruise missile.

An administration official told the Associated Press that the U.S. feels the breach of the Intermediate-Range Nuclear Forces Treaty, commonly known as the I.N.F. Treaty, is a “very serious matter.”

According to the New York Times, which first reported the accusation, President Obama informed Russian President Vladimir Putin in a letter Monday of the U.S.’ determination that Russia broke the agreement.