After President Barack Obama sternly called on Russian President Vladimir Putin to compel Kremlin-backed separatists to stop hampering the probe at the site of a downed passenger jet, Sen. Lindsey Graham (R-S.C.) took to Twitter to blast Obama, saying he has no “situational awareness.”

Obama said now is the time for Putin to “get serious” about resolving the crisis in Ukraine and if he fails to take steps to do so, the economic costs to Russia will continue to increase.

It didn’t take Graham long to respond.

“President Obama has no situational awareness regarding the adversaries he faces,” Graham initially said, which he followed upon.

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