Among Ms. Thomas’s top targets have been officials at the National Security Council, the former head of the White House personnel office, Sean Doocey, and other top White House aides. Another target was Jessie K. Liu, who recently left her job as the U.S. attorney for the District of Columbia for a job in the Treasury Department that was later withdrawn by the White House…

Some administration aides have long been suspicious that people like Ms. Thomas and Ms. Dunlop are less interested in pro-Trump purity than in appointments for their own networks of friends. White House officials have privately questioned Ms. Thomas’s lobbying on personnel, and have said Mr. Trump — who is facing several decisions before the Supreme Court personally and in terms of administration policy — has made clear he is conscious of whom she is married to…

Privately, officials in that office told associates that Ms. Thomas’s suggested hires could never survive proper vetting, including possibilities such as David A. Clarke, the former sheriff of Milwaukee County for a homeland security role, or the Fox News guest Dan Bongino for a counterterrorism post.