WAHSINGTON ― Elon Musk arrived at the White House with a bang. He was the chainsaw-wielding government slasher and President Donald Trump's chief sidekick who promised to gut the federal bureaucracy.

The billionaire Tesla CEO departed a day after he called a Republican bill to fund Trump's agenda "disappointing."

At a celebratory rally after Trump’s inauguration, Musk’s White House career got off to a contentious start when he seemingly offered a straight-arm salute at the Capitol One Arena in Washington, D.C., as he excitedly told the crowd: “My heart goes out to you.”

The nation's capital had never seen anyone like Elon Musk, who announced this week that he's stepping back from his role as Donald Trump's most unorthodox adviser. Musk, the world's richest person in the world,

Elon Musk's days working at the White House are over. Musk, the billionaire Tesla CEO whom President Donald Trump enlisted to cut waste in the federal government, started offboarding from his role, a White House official told NBC News,

Tesla CEO Elon Musk's role with the Trump administration ended on Wednesday and will be able to focus more time on Tesla, as the company has faced headwinds this year.

"It is very hard to separate Elon Musk's brand from the brand of Tesla, and SpaceX," a Harvard Business fellow told Newsweek.

Elon Musk is leaving Washington after a short but turbulent stint in government and getting back to his numerous businesses, each with their own set of issues for the billionaire to address.