Why Hasn't Mueller Interviewed Ivanka Trump?

President Trump's daughter Ivanka Trump has been present at extremely high-profile moments of her father's presidency. She lobbied her father to hire Paul Manafort.She also spoke briefly at Trump Tower with a Russian lawyer and a lobbyist who was present for that meeting during the campaign. Yet Special Counsel Robert Mueller has yet to call her for questioning. According to Politico, enemies of Ivanka speculate it's because she's actually a target of Mueller's investigation, and therefore wouldn't be interviewed. Others say Mueller is trying to avoid triggering President Trump to decry how unfairly he and his family are being treated in an investigation he has already deemed a “witch hunt.”