Page says he had no personal information about Russian election interference.
Manafort, who ran Trump's presidential campaign for several months previous year, and associate Richard Gates pleaded not guilty last week to a 12-count indictment by a federal grand jury.
Speaking on CBS's "Face the Nation", Senate intelligence committee ranking Democrat Mark Warner, of Virginia, said he might want to hear more from Sessions.
Feinstein, the Senate Judiciary Committee's top Democrat, said on CNN's "State of the Union" that she would discuss bringing Sessions before her panel with the committee's Republican chairman, Iowa Sen.
Page sent the email describing his interaction with Dvorkovich in Moscow to campaign aide J.D. Gordon, as well as a different campaign aide.
Papadopoulos also told his superiors on the campaign that he was being offered "dirt" on Democratic rival Hillary Clinton and "off the record" meetings with Russian leaders - which, according to court documents, he was encouraged to pursue.
Page's trip to Moscow has previously been disclosed, but in testimony before the House intel committee last week, the former adviser informed congressional investigators he had notified former campaign manager Corey Lewnadowski and White House communications director Hope Hicks of his travel to Russian Federation.
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For months, Page has denied meeting with Russian government officials while in Moscow.
Lawmakers are expected to ask Schiller what he knows about Trump's 2013 trip to Moscow and a 35-page dossier that a former British intelligence officer wrote about Trump's behavior on the trip to visit the Miss Universe pageant.
WASHINGTON-A former Trump campaign adviser told Congress he had a private conversation with a Russian deputy prime minister during the 2016 presidential campaign and that at least two members of the president's team were aware, providing more details to what is publicly known about Moscow's access to U.S. President Donald Trump's circle, according to a congressional transcript released late Monday.
The House panel's top Democrat, Rep. Adam Schiff of California, cited a memo Page sent campaign officials that quoted Page as writing "in a private conversation, Dvorkovich expressed strong support for Mr. Trump and a desire to work together toward devising better solutions in response to the vast range of current worldwide problems". After the reports, Sessions went on to recuse himself from investigations related to the 2016 campaign.
"You have them both reporting back to the campaign, you have the campaign deceiving the public about their knowledge of these things", Schiff said."So I hardly think that these are coincidental".
And the argument that this is all a hoax or witch hunt has fallen on deaf ears.
With his Russian Federation ties under scrutiny, Page said in September 2016 that he was taking a leave from the campaign.