Trump slams Mexico, El Salvador on MS-13: "We need The Wall!"

President Trump blasted El Salvador and Mexico in a morning tweet by claiming that they allow deported MS-13 gang members to "come back in [to the United States]...like water." He also stated those gang members are being removed "by the thousands" — an assertion, per The Washington Post, that isn't backed up by hard numbers.

Go deeper: There's no more vital promise in Trump country than the wall.