 Officials say the policy is still being worked on by administration officials and has not yet been agreed upon by President Biden. One official said Biden is absolutely firm that he will not be sending troops to Ukraine. And now this. The Department of Homeland Security says it has identified over 400 migrants who were brought to the United States by a human smuggling network affiliated with ISIS. Sources with the DHS told NBC News that over 150 of the migrants have been arrested so far.