Donald Trump’s deputy chief of staff Stephen Miller and his wife, Katie, have become embroiled in a bitter and still escalating feud between the president and billionaire Elon Musk. Katie Miller served as a top spokesperson for the White House and an advisor for Musk's so-called Department of Government Efficiency. As the Daily Beast reported last week, Musk "was known to spend large amounts of time" with both Millers, "even outside of work," sparking a flurry of rumors that their relationship had broached coworker boundaries. Then, Musk had his epic falling out with the president last week, with Katie Miller […]