GOP Senator Links Ukraine, Benghazi

US Senator Lindsey Graham speaks as he takes part in a press conference with unseen US Senator John McCain at the US Embassy in Kabul on January 2, 2014. A decision to release jailed Taliban militants further aggravated US-Afghan relations as pressure mounts for the two countries to sign a deal allowing some American soldiers to stay after 2014. The plan to free 88 insurgent suspects from Bagram jail has outraged US military officials and senators as final negotiations are underway on the long-delayed Bilateral Security Agreement (BSA). AFP PHOTO/Noorullah SHIRZADANoorullah Shirzada/AFP/Getty ImagesNOORULLAH SHIRZADA / AFP - Getty Images

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Republican Sen. Lindsey Graham of South Carolina tweeted on Tuesday that the ongoing crisis in Ukraine "started" with the Obama administration's response to the 2012 Benghazi attacks.

Graham is a frequent critic of the Obama administration on foreign policy issues and a leading voice of outrage over the Benghazi attacks.