 The delegates will hear from some of former President Trump's previous challengers this evening, including tech billionaire Vivek Ramaswamy and former South Carolina governor and U.N. ambassador Nikki Haley. They just heard from Arizona Senate candidate and former TV news anchor Carrie Lake. Mr. Trump is expected to make an appearance tonight. This is ABC News. While the Republicans keep doing their thing, President Biden has cranked up his rhetoric again against Donald Trump as he addressed an NAACP convention in Vegas this evening.