Elon Musk is lashing out at Wedbush Securities analyst Dan Ives, telling the technology analyst to "Shut up."

Mr. Yarvin has called for the expansion of the use of phone apps for automated voting to increase turnout in elections and decrease the importance of candidate quality.

Weeks after the billionaire left his role at the Department of Government Efficiency amid his feud with President Trump, a small band of Musk loyalists is fighting to preserve the legacy—and power—of...