fortress was part of an air show featuring historic fighter planes. >> to our viewers, thank you very much for watching. i'm wolf blitzer in the situation room, erin burnett starts "out front" right now. "out front" next, breaking news. trump's public meltdown, swearing, lying and pushing accusations from everyone from biden to the whistle-blower. is the impeachment pressure getting to the president? plus democrats putting the white house on notice interfere with the impeachment investigation and there will be a serious price to pay, so what price will that strategy work or backfire? bernie sanders' health scare. the 2020 democrat out for a heart procedure. what does this mean for his campaign? let's go out front. good evening. i'm erin burnett. out front tonight, trump loses his cool. it started with more than a dozen tweets including this, a clear loss of temper accusing democrats of all caps, bull