WASHINGTON — Tesla chief executive Elon Musk threatened Wednesday to resign his position as an adviser to President Trump if the United States withdraws from the Paris climate deal, a remark that highlights Trump’s precarious position in a high-stakes international standoff.

Trump could decide as early as this week whether the United States will remain in the historic Paris Agreement, which reflects a voluntary commitment by the world’s governments to reduce their carbon emissions.

Musk said on Twitter that he had done all he could to advise the White House on the deal signed in 2016 by 195 countries.

Asked by another Twitter user what would happen if Trump withdraws despite Musk’s advice, the entrepreneur said he would have ‘‘no choice’’ in the matter.

As a technology executive who has cited climate change as a key reason behind his push for electric vehicles, Musk has a personal and professional stake in the United States’ climate-change policies.

Musk’s resignation in protest would show a loss of faith in Trump by a key business leader, weakening the economic credibility Trump sought for his administration by appointing nearly 20 powerful CEOs to an advisory council in December.

Trump faced urgent pleas from other corporate leaders, including Tim Cook, the chief executive of Apple, who told him that pulling out was wrong for business, the economy, and the environment

Momentous arguments inside the West Wing became a messy public spectacle Wednesday, with some aides saying Trump had decided to abandon the agreement while others insisted that no decision had been made.

Three administration officials with direct knowledge of the intense debate said that Trump was expected to withdraw from the accord.

On Wednesday evening, Trump tweeted that he had made his decision and would announce it in the Rose Garden at 3 p.m. Thursday. Three officials said they expected him to withdraw from the agreement, though they said that decision could still change. The White House’s legislative affairs office has suggested another route: sending the Paris agreement to the Senate for ratification as a treaty. Since it would require a very improbable two-thirds vote, that alternative would also lead to withdrawal.

Other White House insiders disputed those reports, saying that no verdict had been reached.

Trump, speaking to reporters Wednesday afternoon, offered only that “I’m hearing from a lot of people, both ways.’’

Material from The New York Times and the Associated Press was used in this report.