FRONTLINE “The Gang Crackdown” Director Marcela Gaviria: MS-13 worked in the favor of “A new president that wanted to find an excuse to round up immigrants and deport them”

Suspected members of the MS-13 gang are escorted to their arraignment in Mineola, N.Y., Thursday, Jan. 11, 2018. Nassau County authorities say a grand jury has indicted alleged members of the notoriously violent MS-13 gang on a slew of charges including murder, conspiracy to commit murder and drug trafficking. (AP Photo/Seth Wenig)

FRONTLINE documentary “The Gang Crackdown” Director Marcela Gaviria explains the impact of the MS-13 gang, in light of President Trump’s remarks in his State of the Union address. She tells John what MS-13 is and how it’s brought an advantage to the president’s arguments about immigration. Catch “The Gang Crackdown” tomorrow at 10 p.m. on Channel 11.