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WASHINGTON, DC - FEBRUARY 03: Sen. Rand Paul (R-KY) leaves the weekly Republican Senate policy luncheon at the U.S. Capitol February 3, 2015 in Washington, DC. Senate Democrats filibustered the legislation to fund the Homeland Security Department because it included a measure to roll back President Obama's executive order on immigration. (Photo by Chip Somodevilla/Getty Images)
WASHINGTON, DC - FEBRUARY 03: Sen. Rand Paul (R-KY) leaves the weekly Republican Senate policy luncheon at the U.S. Capitol February 3, 2015 in Washington, DC. Senate Democrats filibustered the legislation to fund the Homeland Security Department because it included a measure to roll back President Obama's executive order on immigration. (Photo by Chip Somodevilla/Getty Images)

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GOP super PAC ruining Rand's big day

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John King, Lisa Lerer and Robert Costa weigh in on a new super PAC ad that's raining on Sen. Rand Paul's parade.