A.M. Edition for Feb. 15. The Republican chairman of the House Intelligence Committee warned yesterday of a \u201cserious national-security threat\u201d that people familiar with the matter said related to Russian ambitions to develop a nuclear weapon in space, leading House Speaker Mike Johnson to try and reassure the public. And as America\u2019s immigration influx continues to spark a political firestorm, the WSJ\u2019s Paul Kiernan says a new report finds it could also trigger an economic windfall. Luke Vargas hosts.\xa0\n\nLearn more about your ad choices. Visit megaphone.fm/adchoices