What we know about Elon Musk’s ‘Department Of Government Efficiency’ and bromance with Donald Trump.

Donald Trump's announcement that Elon Musk and Vivek Ramaswamy will lead a newly formed Department of Government Efficiency has alarmed some government ethics experts.

ABC News’ Elizabeth Schulze reports on how tech billionaire Elon Musk was able to gain access to President-elect Donald Trump’s inner circle and gain so much political influence.

Donald Trump has announced that Elon Musk and Vivek Ramaswamy, a former presidential candidate and ally of Trump, will lead a new "Department of Government Efficiency."

Tricia McLaughlin, former senior adviser to Vivek Ramaswamy, discusses the work to be done under what President-elect Donald Trump is calling a new "Department of Government Efficiency."

Adam Clark Estes, senior technology correspondent at Vox discusses the significance and influence billionaire Elon Musk has had in the Trump orbit over the last week.

The Washington Post’s Drew Harwell explains how billionaire Elon Musk has leveraged his money to further his political objectives.

Several people close to Donald Trump have stressed to ABC News the significance and influence billionaire Elon Musk has had in the Trump orbit over the last week.

Several people close to Donald Trump have stressed to ABC News the significance and influence billionaire Elon Musk has had in the Trump orbit over the last week.

The president-elect returned to golf at Trump International, the same course where an assassination attempt was made against him in September.

The president-elect had Elon Musk listen in and speak with Ukrainian President Zelenskyy.

Elon Musk joined Donald Trump's phone call with Ukrainian President Volodymyr Zelenskyy on Wednesday, multiple sources with direct knowledge of the call told ABC News.

The president-elect handed the phone to Musk at one point during Zelenskyy's congratulatory call on Wednesday, sources told ABC News. The billionaire was a major presence during Trump's campaign.

Elon Musk, the world's wealthiest person, has campaigned in support of Trump.

Philadelphia District Attorney Larry Krasner sought an emergency injunction to stop Elon Musk's America PAC's million-dollar giveaway.

Musk, the world's richest person, has sought to help elect Donald Trump.

The Philadelphia district attorney sued Elon Musk and his super PAC on Monday over the billionaire's controversial $1 million giveaway.

The Justice Department has warned Elon Musk's America PAC that his $1 million giveaway to swing-state registered voters may violate federal law, a source says.

Musk, the world's richest person, is a prominent supporter of Trump.

Former President Donald Trump’s billionaire supporter has awarded checks to several voters who signed his petition to support the First and Second Amendments. ABC News’ John Santucci reports.

ABC’s Olivia Rubin reports on how billionaire Elon Musk is using his megaphone to allegedly amplify misinformation to millions while on the campaign trail for former President Donald Trump.

In a series of town halls, tech billionaire Elon Musk has sought to harness his power as an influencer to help return Donald Trump to the White House.

In a letter to the Federal Communications Commission, 100 space researchers asked for the agency to pause new satellite launches to allow for environmental review.

In a letter to the Federal Communications Commission, 100 space researchers asked for the agency to pause new satellite launches to allow for environmental review.

The Philadelphia district attorney sued Elon Musk and his super PAC on Monday over the billionaire's controversial $1 million giveaway.

Elon Musk has been in regular contact with Vladimir Putin since 2022, according to an article in the Wall Street Journal on Thursday.

Local election officials have been taking to X to refute owner Elon Musk's false election claims -- but their reach pales in comparison to Musk's 200 million followers.

The tech titan and Russian President Vladimir Putin have been in regular contact since 2022, according to the Wall Street Journal.

The giveaway seems illegal, but occupies a blurry area of law, experts told ABC News.

Businessman Mark Cuban told ABC News that with two weeks until Election Day, the vice president has momentum on her side, but that she can improve as a salesperson.

Anna Massoglia, editorial and investigations manager at OpenSecrets talks to ABC News Live about the recent monetary giveaways by Elon Musk's America PAC.

While speaking at a town hall in Pennsylvania, tech CEO and Trump supporter Elon Musk repeated false conspiracy theories claiming that voting machines rig elections.

Tesla is set to hold an event Thursday titled “We, Robot” where the company is expected to unveil a fully autonomous vehicle that CEO Elon Musk has called a “Cybercab.”

ABC News’ Karen Travers and Katherine Faulders with the latest news from the campaign trail.

In a statement Monday, the White House decried a now-deleted post by Elon Musk on X as "irresponsible."

The United Auto Workers Union has filed federal labor charges against former President Donald Trump and Elon Musk, the union said Tuesday.

Donald Trump’s conversation with Elon Musk on X Monday night started almost an hour late as the social media platform was plagued with technical difficulties

The Republican presidential nominee will have a live conversation with Musk on his social platform, X. GOP Congressman Pete Sessions joins the show.

A second patient has been implanted with a chip developed by Elon Musk's company, Neuralink, which he says could give patients “superhuman abilities.” ABC News’ Andrew Dymburt reports.

Musk endorsed Trump last month.

Elon Musk retweeted a campaign ad of Vice President Kamala Harris with audio manipulated by artificial intelligence on his social media platform, X.

Elon Musk is vowing to relocate two of his companies in response to a new California law aimed at protecting children who change their gender identity. ABC News' Andrew Dymburt explains.

Noland Arbaugh, 30, is the first person implanted with Elon Musk's experimental brain chip, Neuralink, and hopes his story can help inspire others with spinal cord injuries.

Noland Arbaugh, who is paralyzed from the shoulders down, became the first human patient to receive the Neuralink device in January.

ABC News correspondent Will Reeve shares a look at his exclusive interview with Neuralink’s first brain chip implant patient.

Elon Musk's Neuralink told ABC News that it is looking to implant two more participants in the coming months.

The company is one of the worst-performing stocks in the S&P 500.

AI experts speak to ABC News about the difference between open-source and closed-source AI, and why it matters that Elon Musk released the code for his AI chatbot.

Following an exclusive nonrestrictive interview with Don Lemon, Elon Musk has cancelled their partnership.

The move centers on a key issue in the fight to shape AI.