WASHINGTON, DC - JULY 14: U.S. Spaker of the House Paul Ryan (R-WI) takes questions from reporters during his weekly news conference at the U.S. Capitol July 14, 2016 in Washington, DC. Ryan said he had yet to begin to write the speech he plans to deliver during next week's Republican National Convention in Cleveland. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - JULY 14: House Speaker Paul Ryan (R-WI) is flanked by members of Congress as he signs the Comprehensive Addiction and Recovery Act, at the US Capitol July 14, 2016 in Washington, DC. (Photo by Mark Wilson/Getty Images)

WASHINGTON, DC - JULY 14: House Speaker Paul Ryan (R-WI), (C), speaks while flanked by bi-partisan members of Congress before signing the Comprehensive Addiction and Recovery Act, at the US Capitol July 14, 2016 in Washington, DC. (Photo by Mark Wilson/Getty Images)

WASHINGTON, DC - JULY 14: House Speaker Paul Ryan (R-WI), (C), is flanked by members of Congress as he signs the Comprehensive Addiction and Recovery Act, at the US Capitol July 14, 2016 in Washington, DC. (Photo by Mark Wilson/Getty Images)

WASHINGTON, DC - JULY 14: House Speaker Paul Ryan (R-WI), (C), speaks while flanked by bi-partisan members of Congress before signing the Comprehensive Addiction and Recovery Act, at the US Capitol July 14, 2016 in Washington, DC. (Photo by Mark Wilson/Getty Images)

WASHINGTON, DC - JULY 14: House Speaker Paul Ryan (R-WI), (C), speaks while flanked by bi-partisan members of Congress before signing the Comprehensive Addiction and Recovery Act, at the US Capitol July 14, 2016 in Washington, DC. (Photo by Mark Wilson/Getty Images)

WASHINGTON, DC - JULY 13: U.S. President Barack Obama (R) speaks as Terry Cunningham (L) of International Association of Chiefs of Police listens during a conversation on community policing and criminal justice July 13, 2016 at Eisenhower Executive Office Building in Washington, DC. President Obama hosted a conversation with activists, civil rights, faith, law enforcement and elected leaders from around the country on ways can "keep people safe, build community trust, and ensure justice for all Americans." (Photo by Alex Wong/Getty Images) ***BESTPIX***

WASHINGTON, DC - JULY 13: U.S. President Barack Obama speaks during a conversation on community policing and criminal justice July 13, 2016 at Eisenhower Executive Office Building in Washington, DC. President Obama hosted a conversation with activists, civil rights, faith, law enforcement and elected leaders from around the country on ways can "keep people safe, build community trust, and ensure justice for all Americans." (Photo by Alex Wong/Getty Images)