Officially Elon Musk Exits DOGE After 129 Days: Disruption, Debate, and a Divisive Legacy. Elon Musk has officially stepped down as the head of the Department of Government Efficiency (DOGE) after just 129 days, leaving behind a storm of mixed opinions, public scrutiny, and a deeply polarizing legacy. The tech billionaire’s short but headline-dominating tenure under the Trump administration was marked by bold promises, sweeping reforms, and frequent controversy.