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WASHINGTON, DC - JANUARY 10:  Mark R. Warner (D-VA), Vice Chair of the Senate Select Committee on Intelligence, speaks during the Senate (Select) Intelligence Committee in the Dirksen Senate Office Building on Capitol Hill January 10, 2017 in Washington, DC.  The committee was holding a hearing about cyber threats to the United States and fielded questions about effects of Russian government hacking on the 2016 presidential election.  (Photo by Joe Raedle/Getty Images)
WASHINGTON, DC - JANUARY 10:  Mark R. Warner (D-VA), Vice Chair of the Senate Select Committee on Intelligence, speaks during the Senate (Select) Intelligence Committee in the Dirksen Senate Office Building on Capitol Hill January 10, 2017 in Washington, DC.  The committee was holding a hearing about cyber threats to the United States and fielded questions about effects of Russian government hacking on the 2016 presidential election.  (Photo by Joe Raedle/Getty Images)

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On State of the Union, Sen. Mark Warner discusses what can be done after the recent school shooting in Santa Fe, Texas.