house. thank you. the newest democratic candidate for president making his first campaign stop today. mike bloomberg launching a blistering attack on president trump. let's get more on that from nbc's andrea mitchell. >> reporter: after years of will he or won't he three-term new york mayor michael bloomberg, a former republican turned independent a democrat, in a virginia diner today now a presidential candidate. no kickoff rally with supporters just an announcement with reporters. >> i am running for president to defeat donald trump and to unite and rebuild america. >> reporter: fearing a biden slump, a warren surge and a trump victory, bloomberg saw an million in tv ads to instant criticism from opponents billionaire is skipping the early primaries. he only needs gs ne but can bloomberg win over african americans despite his stop and frisk program, ruled unconstitutional for targeting