The U.S. Supreme Court on Thursday was asked for the first time to wade into a clash over the secrecy of President Donald Trump’s financial records, as his lawyers urged the justices to stop a Manhattan grand jury from acquiring eight years of his tax returns.

The petition, filed by Jay Sekulow, a personal lawyer for Trump, is likely the beginning of a series of Trump-related cases that are expected to reach the Supreme Court in the coming months. Indeed, a new federal appeals ruling in Washington late Wednesday—saying Trump’s accounting firm must comply with a congressional subpoena—could land at the high court by next week.