A settlement between President Trump and the IRS that created a $1.8 billion "anti-weaponization" fund was expanded Tuesday to bar additional tax investigations into him, his family and his businesses.Why it matters: The expanded waiver intensifies scrutiny of a controversial settlement involving agencies Trump effectively oversees.What's inside: The one-page document says the IRS is "forever barred and precluded" from prosecuting or pursuing any and all claims related to the plaintiff or affiliated individuals.Between the lines: The expanded settlement was not included in the Justice Department's initial nine-page agreement released Monday, nor was it signed by the same parties.Tuesday's waiver is signed by Acting Attorney General Todd Blanche, who previously served as Trump's personal lawyer in his cases including his New York criminal fraud trial.Monday's agreement was signed by the CEO of the IRS, Associate Attorney General Stanley Woodward and Trump's legal counsel.The intrigue: Most federal officials, including the president, cannot stop the IRS from pursuing specific investigations.However, the attorney general appears to be excluded from that restriction. Catch up quick: The settlement was reached after Trump dropped his suit against the IRS after a former contractor leaked his confidential tax returns to members of the media.Instead of receiving a direct payout, attorneys for the president settled to create a $1.776 billion fund to compensate those who were targets of political "weaponization," or who faced prosecutions for political aims.The decision sparked outrage from critics who said it was unusual for the president to pursue damages from an agency he controls.The DOJ did not immediately respond to Axios' Tuesday afternoon request for comment.Go deeper: Trump creates $1.8B "anti-weaponization" fund after dropping IRS suit