Musk, the owner of car manufacturer Tesla and social media platform X, has been tapped by Trump to lead the proposed Department of Government Efficiency (DOGE), with biotech entrepreneur and former Republican presidential candidate Vivek Ramaswamy, after vocally supporting and financially backing his campaign for president.

When it comes to controlling GOP leaders, Musk has a real advantage. Trump's favorite tool to keep politicians in line, threatening to run a primary opponent, makes even more sense for Musk, who can offer any such person limitless financial resources.

After Congress averted a government shutdown with a last-minute deal, it’s become a serious question: who runs the GOP, Donald Trump or Elon Musk? While Trump is about to be sworn in for his second term,