Former President Donald Trump asked the Supreme Court on Tuesday to intervene in a dispute over classified materials the FBI seized from his Mar-a-Lago property this summer, CNN reported.

His filing with the Supreme Court is the latest example of the former president trying to involve judges in investigations against him at a time when the high court’s legitimacy in politically explosive cases is under scrutiny.

Trump is specifically asking the court to ensure that more than 100 documents marked as classified are part of a special expert examination. The request, if approved, could bolster the former president’s attempt to challenge the search in court because he argued he had the right, as a former president, to possess certain government documents, including documents that could contain the country’s most sensitive secrets.

However, Trump is not asking the Supreme Court to block the Justice Department from using the documents in a criminal investigation into how White House materials were mishandled.

Judge Clarence Thomas — the recipient of Trump’s request because he oversees litigation arising in a district court that hears an appeal of the master’s special order — gave the Justice Department until Tuesday, Oct. 11 at 5 p.m. to respond.

It remains to be seen whether allowing a special master — an outside attorney charged with examining evidence and reviewing confidential documents — to also have access to classified documents poses a real threat to a criminal investigation.

It’s also unclear how sympathetic the high court will be to Trump’s claims, which rely largely on technical arguments about whether the appeals court had the authority to exclude 100 documents from consideration.