New York City mayor again heads to the southern border to highlight influx of migrants. https://www.politico.com/dims4/default/f51a350/2147483647/strip/true/crop/3000x2000+0+0/resize/630x420!/quality/90/?url=https%3A%2F%2Fstatic.politico.com%2F2d%2F59%2Fd19ec1884a00a4d468e0375dac9f%2Fnyc-mayor-48632.jpg