Twitter may be reluctant to crack down on politicians' tweets, but it still has its limits -- and one political candidate may have crossed the line. The social media giant has permanently banned Republican House candidate Danielle Stella's personal and campaign accounts for "repeated violations" of Twitter's policies. While it didn't elaborate on what those violations were, Stella's campaign suggested that her potential rival, incumbent representative Ilhan Omar, should be "tried for #treason and hanged" if she was found to have passed sensitive info to Iran through Qatar. That claim is unsupported by evidence. The posts may have violated Twitter policies forbidding the promotion of violence or threats.