 In Milwaukee, Trump's campaign says he's likely to announce his running mate this afternoon. All of this two days after an assassination attempt on the former president at a rally in Pennsylvania. CBS's Meg Oliver has more on the investigation. The shooter purchased a box of ammunition with 50 rounds on the day of the attempted assassination of former President Donald Trump. We also know that the FBI believe he acted alone and he was not on the Bureau's radar. As far as a motive, we are still...