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US Republican Senator from Kentucky Rand Paul addresses the 2015 Conservative Policy Summit at the Heritage Foundation in Washington on January 13, 2015. Paul is a possible presidential candidate in next year's election.  AFP PHOTO/NICHOLAS KAMM        (Photo credit should read NICHOLAS KAMM/AFP/Getty Images)
US Republican Senator from Kentucky Rand Paul addresses the 2015 Conservative Policy Summit at the Heritage Foundation in Washington on January 13, 2015. Paul is a possible presidential candidate in next year's election.  AFP PHOTO/NICHOLAS KAMM        (Photo credit should read NICHOLAS KAMM/AFP/Getty Images)

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    Rand Paul to launch 2016 run today

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Rand Paul to launch 2016 run today

John King, Lisa Lerer and Robert Costa discuss the Kentucky senator's upcoming announcement about his plans for 2016.

Rand Paul to launch 2016 run today

John King, Lisa Lerer and Robert Costa discuss the Kentucky senator's upcoming announcement about his plans for 2016.