"I think we're all pretty confident, given that we've been through this process a number of times, but we would assess that at that point, " Sanders said.
Ramirez alleges that Kavanaugh exposed his penis to her during a drunken party at a Yale University dormitory, when they were undergraduates.
He also hinted that the investigation could expand beyond the sexual assault allegations against Kavanaugh - which the judge has forcefully denied - and blasted Democrats who, he alleged, made the confidential complaint of Christine Blasey Ford public.
The Senate Judiciary Committee on Friday voted to send Kavanaugh's nomination for the Supreme Court to the full Senate after securing a party line vote in favor of Kavanaugh's nomination from Republican Jeff Flake, who requested a delay and investigation.
Later that day, Trump ordered the investigation and that it be limited in scope and completed by next Friday.
After Ford appeared before the Judiciary Committee, Trump said her testimony was "very compelling" and that she appeared to be "certainly a very credible witness".
"The Senate is dictating the terms", she said on Fox News Sunday, adding she was not "aware of" any directives from White House Counsel Don McGahn, and adding that senators would need to answer questions about any limits they might have placed.
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FILE PHOTO: A Delta Air Lines flight is pushed put of its gate at the airport in Salt Lake City, Utah, U.S., January 12, 2018. The airline said Delta flights in the air were not disrupted. " We apologize to all customers for this inconvenience ".
Kavanaugh testified three times Thursday that Blasey's friend Leland Keyser "refuted" Blasey's claim "under penalty of felony".
Ford told the Senate judiciary committee that Kavanaugh and his friend Mark Judge "were visibly drunk" and attacked her in one of the bedrooms at the house. The Washington Post found him there Monday, where his lawyer said he had fled to try to avoid an avalanche of media requests and criticism.
"The supplemental FBI background investigation would be limited to current credible allegations against the nominee and must be completed no later than one week from today", the committee said.
Sen. Sheldon Whitehouse, a Democratic member of the Judiciary Committee from Rhode Island, said he expects the FBI would provide adequate staffing for the investigation, with teams working in parallel to investigate separate allegations.
"Judge Kavanaugh asked to be heard to clear his good name and speak directly to the American people, and he did so forcefully yesterday".
"It's risky in the sense that some of our colleagues take the position that all you need to do is listen to an accusation, and that's enough to make up your mind".
Flake's move puts in doubt the fate of Kavanaugh, who has in recent days drawn strong support from Trump and other top Republicans, but now faces another week of scrutiny and must watch as senators in both parties endure mounting pressure from their respective bases to either rally to his side or block his confirmation.
Amid reports of the White House tightening the reins on the investigation, Trump said: 'The FBI I believe is doing a really great job.
"This whole two-week effort has been a calculated and orchestrated political hit, fueled with apparent pent-up anger about President Trump and the 2016 election", he said.
He already had been accused by another woman of attempted sexual assault when the two were in high school. "Kavanaugh's truthfulness with the Senate goes to the very heart of whether he should be confirmed to the court".