U.S. faces 'crisis' at southern border, Nielsen says

Testifying before Congress for the first time since Democrats took control of the House of Representatives in January, Nielsen defended President Donald Trump's decision to declare a national emergency to unlock funding for a wall on the U.S.-Mexico border."Illegal immigration is simply spiraling out of control," Nielsen told the House Homeland Security Committee.Democrats questioned Nielsen over the Trump administration's "zero tolerance" prosecution policy, which last year led to the separatio