Roger Stone posted an Instagram story Sunday afternoon calling for former CIA Director John Brennan to be hung for treason. “This psycho must be charged, tried, convicted" the provocateur and Republican operative wrote, below which he placed a photo of Brennan and then added, "and hung for treason,” The post was removed by Instagram soon after it was posted, with the company saying it "violated our Community Guidelines." Stone, 66, was arrested at his Florida home on Jan. 25 and charged by special counsel Robert Mueller with lying to Congress, obstructing justice, and witness tampering. He pleaded not guilty and...