Special Counsel Jack Smith is soon expected to file an “oversized brief” filled with “sensitive material” in the criminal case Donald Trump faces in D.C.

Smith on Saturday submitted a filing to Judge Tanya Chutkan asking for permission to send an oversized brief in the case, which involves allegations that the former president unlawfully attempted to interfere with the election he lost to President Joe Biden in 2020.

The expected brief will deal with immunity issues stemming from the U.S. Supreme Court’s ruling that found limited immunity for Trump in certain cases.

MSNBC legal analyst Lisa Rubin flagged the new filing over the weekend, saying, “Steel yourself.”

“In a new filing, the Special Counsel tells Judge Tanya Chutkan its opening immunity brief will be roughly 180 pages with roughly half devoted to a ‘detailed factual proffer’ and plenty of sensitive material warranting redactions,” the attorney added. “The defense opposes the Special Counsel’s request to file such an oversized brief and has asked to have until Tuesday at 5 pm to submit a written opposition.”

Kyle Cheney, senior legal affairs reporter for Politico, also reported on the upcoming brief, saying, “Jack Smith signals his brief on presidential immunity, due Thursday, will come in at 180 pages.”

Legal analyst Allison Gill, better known as Mueller, She Wrote, added that “Jack Smith asks for permission to exceed the page limit for his immunity brief. It will be 180 pages, and as expected, they intend to file a substantial part of it UNDER SEAL.”

Former prosecutor Barb McQuade said, “Not a surprise that Jack Smith’s brief in immunity case is lengthy. He plans to lay out the mountain of evidence against Trump.”

Former acting Assistant Attorney General Jeffrey Clark, who was indicted alongside Trump in the election subversion case in Georgia, responded to Rubin’s note:

“See, the JournoLawfare people like Rubin are already building anticipation for Jack Smith’s smear attack on Trump coming out on Thursday,” he wrote.