U.S. Deputy Attorney General Rod Rosenstein, who oversees the special counsel investigation into Russia's role in the 2016 presidential election, has verbally resigned in anticipation of being fired by President Donald Trump, Axios news site reported.
A second source told Axios that Rosenstein is "expecting to be fired" so he plans to step down.
There was widespread speculation that Trump would fire Rosenstein after a New York Times report on Friday said in 2017 he had suggested secretly recording Trump and recruiting Cabinet members to invoke a constitutional amendment to remove him from the office.
Rosenstein assumed the role in the Russia investigation after his boss, Attorney General Jeff Sessions, recused himself after his own contacts with Russia's ambassador to Washington while serving as a Trump campaign adviser became public.
Trump has regularly dismissed the investigation as a "witch hunt."