Updated

Elon Musk, the CEO of Tesla and SpaceX, threatened to leave two White House advisory councils should President Trump pull the U.S. out of the landmark Paris Climate Agreement.

Musk said he will have “no choice” but to depart the councils if Trump makes the decision.

Trump will announce his decision on the involvement of the U.S. in the accord on Thursday. Two sources told Fox News that he is expected to pull the U.S. out of the deal.

The accord, agreed to by the Obama administration along with almost 200 other countries in 2015, would have forced the U.S. to reduce fossil fuel emissions by nearly 30 percent by 2025.

During Trump’s overseas trip last week, European leaders pressed him to keep the U.S. in the landmark agreement.

Trump promised during his presidential campaign to pull the U.S. out of the deal.

The Associated Press contributed to this report.