WASHINGTON — The Democratic chairman of the Senate Judiciary Committee and one of its most senior Republicans escalated their demands Monday for information from Meta CEO Mark Zuckerberg about Instagram's now-shuttered "warning screens" for child sexual abuse material, according to a letter first obtained by CNBC. Sen. Dick Durbin, of Illinois, the committee's chairman, and Republican Sen. Ted Cruz, of Texas, gave Zuckerberg 11 days to produce a trove of records and responses related to a still-murky chapter in Instagram's history, and instructed the Facebook founder to preserve any records related to how the Meta platforms' algorithms handled child sexual abuse material. The letter from Durbin and Cruz follows a contentious and emotional Judiciary Committee hearing in January about social media and child sexual abuse material. There, Zuckerberg was repeatedly pushed into the spotlight by Republicans and Democrats alike.