Current and former law enforcement officials told the Times that the bureau intercepted conversations among Russian officials in the first months of the investigation that centered on Page and other Trump associates.
Officials familiar with the process say even if the application to monitor Page included information from the dossier, it would only be after the FBI had corroborated the information through its own investigation.
The Trump administration has worked to distance itself from Page, saying that the Navy veteran and oil consultant played a minimal role in Trump's presidential bid and that the president never actually met him.
The FBI first became alarmed about Page in July, when it learned that he had traveled to Russian Federation in order to deliver a lecture that criticized American foreign policy toward that country. Page was already on the bureau's radar because he had served as a witness in a 2013 federal prosecution of an undercover Russian spy who many believes was trying to cultivate Page (Page claims he didn't know the operative was a Russian spy). It contained multiple unverified assertions-among them that Trump had engaged in compromising activities with Russian sex workers and that Russian officials had won Trump's support with lucrative bribes dressed up as business deals.
In his talk at the New Economic School in Moscow, Page criticized US policy toward Russian Federation in terms that echoed the position of President Vladimir Putin of Russian Federation.More news: Trump welcomes New England Patriots to White House
Page has resurfaced in headlines at several points since the 2016 election - most recently last week, when he declared that he could not "definitively" say that he never discussed United States sanctions with any Russian official.
Carter Page, the former adviser to U.S. President Donald Trump, addresses an audience in Moscow, Russia on December 12, 2016. "Last year, Page was identified by the Trump campaign as an advisor on national security matters, though he has since said that he had limited interaction with the campaign as a volunteer".
Page's relationship with Trump appears to have been fleeting.
Those people were surprised, then, on March 21, 2016, when Trump, speaking to the Washington Post, named "Carter Page, Ph.D.", as a member of his foreign policy team. Page has said he made the trip independent of the Trump campaign and his speech reflected his own views. It is unclear whether any charges will be brought against Trump's former policy adviser. Page denies he knew he was interacting with a Russian spy.