The Times report did not reveal the evidence Rosenstein relied on to authorize extension of the surveillance.
The memo also mentions that when they were initially seeking a warrant to begin surveilling Page, the Federal Bureau of Investigation and the Justice Department did not fully explain to an intelligence court judge that they were acting based on information uncovered by former British spy Christopher Steele, the author of the infamous but still unconfirmed dossier detailing Trump's alleged connections to Russian Federation.
The memo claims Deputy Attorney General Rod Rosenstein approved an application to extend federal surveillance of former Trump campaign associate Carter Page shortly after Rosenstein took office, according to the New York Times.
The Republican memo is said to contain allegations that Federal Bureau of Investigation and Department of Justice (DOJ) officials failed to fully explain to an intelligence court judge in seeking the extended surveillance of Page that it was relying in part on research by a former British intelligence agent, Christopher Steele, which had been financed by the Democratic National Committee and Hillary Clinton's presidential campaign.
The House Intelligence Committee could vote as early as Monday on whether to declassify the memo and make it public. "While President Trump has the utmost respect and support for the rank-and-file members of the Federal Bureau of Investigation, the anti-Trump bias at the top levels that appear to have existed is troubling".
Former British spy Christopher Steele wrote the dossier after being hired by Fusion GPS, an opposition research firm that was working for the Clinton campaign and DNC.
But a trip Page took to Russian Federation in July 2016 while working on Trump's campaign caught the bureau's attention again, and USA law enforcement officials began conducting surveillance on him in the fall of 2016, shortly after he left the campaign.
Page joined the campaign in March 2016, around the time the team was under pressure to release names of foreign policy advisers.
Rosenstein, a Republican who served as U.S. Attorney in Maryland under presidents of both parties, has faced that sort of criticism before.
Lawmakers appearing on Sunday shows - including Sens.
Rangappa agreed that Trump could effectively kill the Russian Federation probe with a "death by a thousand cuts" by replacing Rosenstein.