Five ways the world's richest man changed the White House

Elon Musk's time in the Trump administration is coming to an end after a tempestuous 129 days in which the world's richest man took an axe to government spending - stirring ample controversy along the way.

Earlier this week, the South African-born billionaire, on his social media platform, X, thanked President Trump for his time at the Department of Government Efficiency, or Doge.

Trump announced he will host a news conference in the Oval Office on Friday with Musk, writing: "This will be his last day, but not really, because he will, always, be with us, helping all the way."

While Musk's time in government lasted little more than four months, his work with Doge upended the federal government and had an impact not just in the halls of power in Washington - but around the world.

Let's take a look at some of the ways Musk has left a mark.

The presence of Musk - an unelected "special government employee" with companies that count the US government as customers - in Trump's White House has also raised eyebrows, prompting questions about potential conflicts of interest.

His corporate empire includes large companies that do business with US and foreign governments. SpaceX has $22 billion in US government contracts, according to the company's chief executive.

Some Democrats also accused Musk of taking advantage of his position to drum up business abroad for his satellite internet services firm, Starlink.

The White House was accused of helping Musk's businesses by showcasing vehicles made by Tesla - his embattled car company - on the White House lawn in March.

Musk and Trump have both shrugged off any suggestion that his work with the government is conflicted or ethically problematic.

Around the world, Musk's work with Doge was most felt after the vast majority - over 80% - of the US Agency for International Development's (USAID's) programmes were eliminated following a six-week review by Doge. The rest were absorbed by the State Department.

The Musk and Doge-led cuts formed part of a wider effort by the Trump administration to bring overseas spending closer in line with its "America First" approach.

The cuts to the agency - tasked with work such as famine detection, vaccinations and food aid in conflict areas - quickly had an impact on projects including communal kitchens in war-torn Sudan, scholarships for young Afghan women who fled the Taliban and clinics for transgender people in India.

USAID also was a crucial instrument of US "soft power" around the world, leading some detractors pointing to its elimination as a sign of waning American influence on the global stage.

While Musk - and Trump - have for years been accused by detractors of spreading baseless conspiracy theories, Musk's presence in the White House starkly highlighted how misinformation has crept into discourse at the highest levels of the US government.

For example, Musk spread an unfounded internet theory that US gold reserves had quietly been stolen from Fort Knox in Kentucky. At one point, he floated the idea of livestreaming a visit there to ensure the gold was secured.

More recently, Musk spread widely discredited rumours that the white Afrikaner population of South Africa is facing "genocide" in their home country.

Those rumours found their way into the Oval Office earlier in May, when a meeting aimed at soothing tensions between the US and South Africa took a drastic twist after Trump presented South African President Cyril Ramaphosa with videos and articles he said were evidence of crimes against Afrikaners.