 Meanwhile, Trump says he's leaving for the Republican National Convention, which will be held in Wisconsin. He's leaving today, saying in a post on his social media site that he can't allow a shooter or potential assassin to force changes to scheduling or to anything else. And world leaders are reacting to the shooting, including Canadian Prime Minister Justin Trudeau and also Ukrainian President Volodymyr Zelensky, who says he's appalled. And Piers Ashley Westerman has more from Ukraine.