Senate Minority Leader Charles Schumer (D-N.Y.) and a growing number of Senate Democrats are calling for the Senate to postpone a vote on Supreme Court nominee Brett Kavanaugh after a woman accusing him of sexual assault spoke publicly about the allegation. 

"Senator Grassley must postpone the vote until, at a very minimum, these serious and credible allegations are thoroughly investigated. For too long, when woman have made serious allegations of abuse, they have been ignored. That cannot happen in this case," Schumer said in a statement on Sunday. 

Schumer added that Kavanaugh's credibility was already "seriously questioned" over concerns from Democrats that he misled senators about his work in the George W. Bush administration. 

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"Now his credibility is even more suspect. To railroad a vote now would be an insult to the women of America and the integrity of the Supreme Court," Schumer added. 

Schumer's comments are the first time he's weighed in directly on the allegation since reports first surfaced of the alleged incident on Wednesday. It comes hours after The Washington Post published an interview where Kavanaugh's accuser, Christine Blasey Ford, described the alleged incident. Kavanaugh has denied wrongdoing. 

Though Democrats have largely sidestepped commenting on the sexual assault allegation since late last week, they've begun calling for the vote to be delayed so that the alleged incident can be investigated.

In addition to Schumer, Sen. Dianne Feinstein (D-Calif.), the top Democrat on the Judiciary Committee, and Democratic Sens. Mazie HironoMazie Keiko HironoRubio: ‘I don’t know’ if Nauert has 'detailed knowledge' to succeed as UN ambassador Overnight Defense: Nauert tapped for UN envoy | Trump teases changes to Joint Chiefs of Staff | Trump knocks Tillerson as 'dumb as a rock' | Scathing report details Air Force failures before Texas shooting Dem senator slams Nauert's lack of 'qualifications' for UN ambassador MORE (Hawaii), Kamala HarrisKamala Devi HarrisWarren fell for ‘Trump trap’ with DNA test, says progressive Swalwell: Open to Swalwell-Biden or Biden-Swalwell ticket Boston Globe pans Warren as ‘divisive figure’ ahead of potential 2020 run MORE (Calif.), Richard Blumenthal (Conn.) and Sheldon WhitehouseSheldon WhitehouseSenators want assurances from attorney general pick on fate of Mueller probe Dems vs. Trump: Breaking down the lawsuits against Whitaker Five major takeaways from the federal climate change report MORE (R.I.), each members of the committee, said separately on Sunday that the alleged incident needs to be investigated before the Senate moves forward with Kavanaugh's nomination. 

“It took a lot of courage for Christine Blasey Ford to come forward to share her story of sexual assault by Brett Kavanaugh. Her story is very credible and I believe her," said Hirono, who asked Kavanaugh during his hearing if he had ever been accused of sexual harassment or assault as an adult.

Whitehouse added that Kavanaugh's denial "cannot be reconciled with her specific recollections, and the FBI needs time to take proper witness statements. Lying to an FBI agent in a formal interview is a crime, and an impeachable offense.”
 
Sen. Doug Jones (D-Ala.), a red-state Democrat who has not said how he will vote on Kavanaugh, also called for a vote to be delayed warning against confirming Kavanaugh "under this cloud."  

"It is more important than ever to hit the pause button on Kavanaugh’s confirmation vote until we can fully investigate these serious and disturbing allegations. We cannot rush to move forward under this cloud," Jones, who is not a member of the committee, said in a tweet.

Sen. Bernie SandersBernard (Bernie) SandersCongress digs in for prolonged Saudi battle Santorum: Dems have a chance in 2020 if they pick someone ‘unexpected’ Dems have new moniker for Trump: ‘Unindicted co-conspirator' MORE (I-Vt.) called the allegation against Kavanaugh "a serious one that deserves a full investigation."

"The allegation from Professor Christine Blasey Ford is a serious one that deserves a full investigation," Sanders said in a tweet. "Neither the Judiciary Committee nor the full Senate should vote on Brett Kavanaugh’s nomination to the Supreme Court until that takes place."

A government official previously told The Hill that a criminal investigation into the incident had not been opened. The FBI included the letter in an update to Kavanaugh's background file, which was then given to the White House and the Senate Judiciary Committee. 

Democrats can't block Kavanaugh's confirmation on their own. Republicans hold a majority on the Senate Judiciary Committee and have scheduled the committee vote on his nomination for 1:45 p.m. on Thursday. 

Sen. Lindsey GrahamLindsey Olin GrahamCongress digs in for prolonged Saudi battle Focus on Yemen, not the Saudi crown prince GOP tensions running high on criminal justice bill MORE (R-S.C.), who is a member of the committee, said Sunday he has concerns about the timing of when Ford's allegations have come to light, but expressed a willingness to hear her account in the Senate.

"If the committee is to hear from Ms. Ford, it should be done immediately so the process can continue as scheduled," Graham said in a statement.

Republican members of the Judiciary Committee and Jones, who is not a member of the panel, predicted earlier Sunday that Kavanaugh's nomination would move forward despite the allegation. 

And a spokesman for Sen. Chuck GrassleyCharles (Chuck) Ernest GrassleyOvernight Health Care: House set to vote on bill targeting drug companies for overcharging Medicaid | Dems press Trump officials on pre-existing conditions | Tobacco giant invests .8B in Canadian marijuana grower House set to vote on bill cracking down on drug companies overcharging Medicaid Trump tells McConnell to let Senate vote on criminal justice reform MORE (R-Iowa), the chairman of the committee, on Sunday defended Kavanaugh and called for Feinstein to release the letter which describes the alleged incident. 

"It raises a lot of questions about Democrats’ tactics and motives to bring this to the rest of the committee’s attention only now rather than during these many steps along the way. Senator Feinstein should publicly release the letter she received back in July so that everyone can know what she’s known for weeks," Taylor Foy, the spokesman for Grassley, said. 

Schumer later on Sunday doubled down on his call to postpone the vote, calling for an investigation by the FBI.

"Senate Republicans ran a transparently partisan confirmation process and then immediately insinuated Prof Ford is being untruthful," Schumer said in a tweet. "They cannot impartially investigate these disturbing allegations. That must be done by the FBI, and the vote must be postponed until it is complete."

— Updated 5:29 p.m.