Elon Musk is backing Donald Trump’s transition co-chair Howard Lutnick to lead the Treasury Department, touting the billionaire CEO of Cantor Fitzgerald as a potential secretary who “will actually enact change” from the most powerful economic post in Trump’s cabinet.

Kennedy Jr. sided with investor Howard Lutnick on Saturday in the debate over who President-elect Donald Trump should pick as his treasury secretary, making public the internal jockeying on the decision.