One of the first casualties of a controversial memo that Republicans are poised to make public could be Deputy Attorney General Rod Rosenstein, The Washington Post reports.

Rosenstein reportedly is at the center of the memo, authored by House Intelligence Committee chairman Rep. Devin Nunes, over his approval to extend a Foreign Intelligence Surveillance Act (FISA) warrant on Carter Page, former campaign aide to then-candidate Donald Trump.

Rosenstein and the Justice Department believed Page to be acting as a Russian agent during the campaign, but Nunes' memo reportedly slams Rosenstein for relying on unverified intel from the infamous and hotly contested Trump dossier authored by a former British spy.

Trump, already displeased with Rosenstein for appointing special counsel Robert Mueller to investigate Russia interference in the 2016 election, is mulling using Nunes' memo to validate the notion that the DOJ and FBI are biased against him, providing cause to dismiss Rosenstein, the Post and CNN both reported.

The president could then paint Mueller with that same brush, according to the reports.

Further, new FBI director Christopher Wray is also in the crosshairs of Trump over his public urging - citing "grave concerns" - against the release of the disputed memo.

That came after Wray felt his private entreaties to the White House were rejected, the Post reported.

Wray and Rosenstein went to the White House earlier this week and urged chief of staff John Kelly not to release the memo, the Post reported.

Kelly early Wednesday said that the appropriate national security lawyers were "slicing and dicing" the memo but that he predicted it would get "released pretty quick."