In an extraordinary move, Acting Attorney General Sally Yates has ordered Justice Department lawyers not to defend President Trump’s executive order blocking immigrants from seven mostly Muslim countries.

“I am responsible for ensuring that the positions we take in court remain consistent with this institution’s solemn obligation to always seek justice and stand for what is right,” Yates said in an email to lawyers of the Civil Division on Monday.

“At present, I am not convinced that the defense of the executive order is consistent with these responsibilities nor am I convinced that the executive order is lawful,” she added.

Trump’s executive order is the target of several lawsuits.

But Yates’ directive isn’t likely to last long.

She conceded that her days as acting attorney general are numbered — since Trump’s nominee, Sen. Jeff Sessions (R-Ala.), could be confirmed by the Senate as early as Tuesday.

“[A]s long as I am the Acting Attorney General, the Department of Justice will not present arguments in defense of the Executive Order, unless and until I become convinced that it is appropriate to do so,” Yates wrote.

Yates was appointed by President Obama to be a United States Attorney in 2010, according to a bio on the Justice Department’s website.

She agreed to stay on until Sessions takes over.

Obama nominated her to be Attorney General Loretta Lynch’s deputy on Jan. 8, 2015.