Sens. Rubio (R-FL) And Lee (R-UT) Discuss Their Proposals On Tax Reform [Getty Images]

WASHINGTON, DC - APRIL 15: Republican presidential candidate Sen. Marco Rubio (R-FL) listens to a question while speaking at the Heritage Foundation April 15, 2015 in Washington, DC. Rubio took part in a discussion on "The Case for the Lee-Rubio Tax Reform Plan." (Photo by Win McNamee/Getty Images)

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