Ford has also passed a polygraph test which was administered by a former Federal Bureau of Investigation agent last month.
In a statement to Fox News, Hatch's office said that Kavanaugh told the senator "he was not at a party like the one [Ford] describes" and added that Ford "may be mistaking [Kavanaugh] for someone else".
Kavanaugh had been on a smooth confirmation track, but the new allegations have roiled that process.
She said Kavanaugh and a friend - both "stumbling drunk", she says - corralled her in a bedroom when she was around 15 and Kavanaugh was around 17.
Also Monday, six Democrats on the Senate Judiciary Committee filed a lawsuit seeking to enforce their Freedom of Information Act request for documents on Kavanaugh's work in the White House during the George W. Bush administration.
Following an allegation of sexual assault from a California psychology professor against Supreme Court nominee Brett Kavanaugh, outside groups from both sides of the aisle are readying for an intense messaging battle as Capitol Hill grapples with the political fallout.
Grassley said that so far, the Judiciary committee's top Democrat, Dianne Feinstein of California, has refused to help schedule telephone interviews.
Ms Ford told the Post she changed her mind about coming forward after watching portions of her story come out without her permission.
Those looking to how the public received Hill's accusations against Thomas in hopes that Kavanaugh will still prevail may see a good sign in that the percentage of Americans supporting his nomination did not drop after Hill's allegations and testimony. "We are working diligently to get to the bottom of these claims", Grassley said.
'My client will do whatever is necessary to make sure that the Senate Judiciary Committee has the full story and the full set of allegations to allow them to make a fully informed decision, ' she said.
Debra Katz, attorney representing Ford, joins "CBS This Morning" to discuss details of the allegations and why she thinks Republicans are trying to play hardball.
She also denied that Dr Ford, a Democrat, is politically motivated.
The White House said Monday that they were willing to listen to Ford's allegations after she identified herself over the weekend. She says Kavanaugh groped her over her clothes, grinded his body against hers and tried to take off her one-piece swimsuit and the outfit she wore over it. Kavanaugh covered her mouth with his hand when she tried to scream, she says, and she escaped when the friend, Mark Judge, jumped on them.
The president is facing questions about Kavanaugh amid scrutiny of a woman's claim that the judge sexually assaulted her at a party when they were both in high school. This is very significant for a man of character and integrity to be spoken about so highly by women who maybe didn't vote for President Trump, who maybe don't call themselves Republicans, certainly, in fact, many who don't. In a statement released through the White House, he said "I did not do this back in high school or at any time".
People take part in a protest against Supreme Court nominee Brett Kavanaugh, in front of the New York County Supreme Court at Foley Square in New York City, Aug. 26, 2018.
Sen. Jeff Flake, R-Ariz., who sits on the judiciary committee, joined Democrats in saying the vote on Kavanaugh's nomination may have to be postponed.
But the Republicans only have a single-vote majority on the committee, which they control 11 to 10, while they hold the Senate by just 51-49.