Comey is also likely to be asked by lawmakers about Trump's assertion that the former FBI chief told him three times that he was not under investigation as part of the federal probe into his campaign's possible Russian Federation ties.
Comey is scheduled to testify before the Senate Intelligence Committee at an open hearing on Thursday.
American president Donald Trump talking about his first worldwide trip.
"I know the Senate Judiciary Committee has made a similar request of Mr Comey and I support their request", Schumer said in remarks as the Senate reopened on Monday after a weeklong recess. In any case, Trump will spend the day of Comey's testimony tweeting out lame insults and insane conspiracy theories.
Both Trump's fellow Republicans and Democrats from the intelligence panel said they meant to grill Comey about whether Trump tried to get him to back off the investigation.
Following his dismissal, reports mounted that Trump asked Comey if he was under investigation in a separate FBI probe, and sought to have Comey end an investigation into former top administration official Michael Flynn.
"The president's power to assert executive privilege is well-established", Huckabee Sanders told reporters during the daily press briefing.
Democrats who argue that Trump has already behaved in a manner tantamount to obstructing justice meanwhile jumped on Trump's comment in an NBC interview in May that he was thinking of the Russian Federation probe when he fired Comey.
He reportedly has met with Comey to discuss the probe, and Comey reportedly sought his approval to testify before lawmakers.
It would also move 30,000 government workers into the private sector and was billed by the White House as a first step towards fulfilling Mr Trump's...
The online news outlet said the NSA report depicted a hacking operation tied closely to Moscow's GRU intelligence directorate that targeted private United States companies providing voter registration services and equipment to local governments around the country.