 This is an NBC News Radio special report. The Republican National Convention. I'm Michael Kastner. Donald Trump is calling for unity. He accepted the Republican nomination for president Thursday night at the RNC in Milwaukee and spoke out against political division in his first speech since an assassin tried to shoot him at a campaign rally last weekend. Key Republican senators are telling their party not to get complacent. If reports are true, President Biden will step aside in the presidential race. Rob Dawson in Milwaukee.