 Chicago reporter Charlie DeMar. Investigators say a top priority is gaining access to encrypted sites the shooter may have used. We'll update you as we get more on that. Former President Trump spoke with Ukrainian President Zelensky on the phone Friday, just a day after Mr. Trump formally accepted the GOP nomination for president during the RNC, Republican National Convention. Mr. Trump posted on social media describing it as a very good call. CBS News chief election and campaign correspondent Robert Costa with more on that for us.