A U.S. Senate panel will not move forward with President Donald Trump’s pick for the top federal prosecutor in Washington, D.C. before his temporary appointment expires later this month, a source close to the nomination process told Reuters on Tuesday.

Since returning to office in January, Trump has purged officials he regards as opposed to him and to his agenda. Hayden, nominated by President Barack Obama in 2015 and confirmed on a 74-18 Senate vote the following year, named Perlmutter as head of the Copyright Office in 2020.