 Melania Trump, the former first lady, urging people to come together. Speaker Mike Johnson echoed those thoughts. You also saw the Trump campaign saying that they will not tolerate any dangerous rhetoric from members of their staff. Investigators are now trying to piece together how a gunman armed with an AR-style rifle was able to get in place to injure Trump at his rally in Pennsylvania. Former Secret Service Deputy Director A.T. Smith is a CBS News consultant.