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President Trump's least favorite FBI employee resigned Monday, but one member of the Trump family isn't totally thrilled: Donald Trump Jr.

NBC News reported Monday that FBI Deputy Director Andrew McCabe stepped down, adding that McCabe would remain on the bureau's payroll until March. The president's eldest son took issue with that delay, complaining that keeping McCabe until March means Americans will have to pay for McCabe's pension. Previous reports indicated that McCabe had long planned on retiring in the spring — at which point he would be eligible for retirement benefits — regardless of Trump's criticisms of him.

Trump Jr. went on to hypothesize that McCabe's resignation is a preemptive defense against the possible release of a controversial memo authored by Rep. Devin Nunes (R-Calif.), which alleges that the FBI improperly surveilled the Trump campaign during the 2016 election. Fox News and various news organizations reported that McCabe had been "removed" from his position. Kelly O'Meara Morales