According to Business Insider, Deputy Attorney General Rod Rosenstein is one of the most-watched officials in Washington.
In September, The New York Times reported that Rosenstein had discussed using the 25th Amendment to remove Trump from office and wearing a wire to record their conversations.
Rosenstein has disputed the report, but it is said to have pushed Trump to weigh firing Rosenstein.
Rosenstein's authority over the special counsel Robert Mueller's investigation into Russia's meddling in the 2016 US election has made his fate a top concern for lawmakers and officials, and thus the most watched in Washington.