The secret memo - which has pushed Republican members of the House to demand its release - reportedly claims that officials did not tell an intelligence court judge that they were partially relying on information from the Christopher Steele dossier in order to obtain the warrant.
In seeking the warrant's renewal, Rosenstein would have had to attest that he believed there was probable cause that Page was acting as an agent of Russian Federation.
Rosenstein approved the continued surveillance of a Trump associate a year ago, according to a report in the New York Times on Monday that once again thrust the former U.S. Attorney for Maryland into the spotlight.
President Donald Trump has recently echoed fellow Republicans in calling for a controversial memo House Intelligence Committee chairman Rep. Devin Nunes wrote about the Justice Department to be released - and we might now know why he's so eager.
Paris readies for floods as Seine surges higher
Crunch-time is expected on Friday or Saturday, following more heavy rainfall forecast for Thursday. In the suburbs significant damage has occurred from flooding, including widespread power outages.
The House Intelligence Committee could vote as early as Monday on whether to declassify the memo and make it public. "But there's no no mystery about the fact that he's livid at [Attorney General Jeff] Sessions for recusing himself and livid at Rosenstein for appointing a special counsel". It would give President Trump five days to object; otherwise, the memo will be released. CNN also reports that Trump has Rosenstein "in his crosshairs" in a story based on four anonymous sources.
Berman remarked that Republicans may be using the FISA warrant as an excuse to attack Rosenstein because he took charge of the Russian Federation investigation after Attorney General Jeff Sessions recused himself.
A Justice Department spokeswoman declined to comment, and a spokesman for Nunes did not reply to requests for comment. "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". Page popped up on investigators' radar a year before after several Russian spies made contact with him in what may have been a recruitment attempt.
The memo is expected to detail abuses by senior FBI officials in their investigation of the Trump campaign, which began the summer of 2016. Without mentioning the Republican memo, he said that federal investigations must be free of bias, and that he would not condone "a culture of defensiveness".