Kavanaugh's confirmation would solidify conservative control of the Supreme Court and advance Trump's goal of moving the high court and the broader federal judiciary to the right.
Hardiman was reportedly Trump's runner-up for the spot taken by Justice Neil Gorsuch.
Then, on Sunday evening, The New Yorker reported that Deborah Ramirez, 53, attended Yale College with Kavanaugh and described a party where he "exposed himself at a drunken dormitory party, thrust his penis in her face, and caused her to touch it without her consent as she pushed him away". Kavanaugh vehemently denied the charge. Dianne Feinstein (D-Calif.), the ranking Democrat on the committee, revealed the existence of an allegation against him after sitting on it for weeks.
"She has agreed to move forward with a hearing even though the Committee has refused to subpoena Mark Judge", it said.
Republican Sen. Chuck Grassley, the committee's chairman, said on Sunday the committee will "evaluate" Ramirez's allegations against Kavanaugh. She said that although she is frightened, "my fear will not hold me back from testifying and you will be provided with answers to all of your questions".
Media reporters and others see the interview as White House-orchestrated propaganda effort to boost Kavanaugh days before one of his accusers testifies before the Senate.
Judge Kavanaugh, in his Fox News interview, repeatedly refused to speculate on motives behind the allegations, telling host Martha MacCallum that he's only looking for a fair hearing and an opportunity to defend his integrity.
The accusation from Ms Ramirez raises the stakes further for a dramatic showdown on Thursday, as Mr Kavanaugh and Ms Ford give evidence in public about an incident she characterises as attempted rape - and that he says simply never happened.
In the letter, Ford explains her motive for coming forward, and the timing of her allegations - which, being just ahead of the Senate vote on Kavanaugh, Republicans including Senate Majority Leader Mitch McConnell have called into question. In one deeply personal exchange with MacCallum, Kavanaugh said that he was sexually inexperienced as a teenager.
Hatch, asked by reporters if Ford's allegations were phony, said, "I think she's honest, at least I hope so". "I hope she comes". Kavanaugh wouldn't comment on the quality of the magazine's reporting, but made some claims that the New Yorker reporters, veteran investigative journalists Jane Mayer and Ronan Farrow, disputed on Twitter. "This is a very dynamic situation. We believe Deborah Ramirez", the event's organisers said on its Facebook page. He declined to provide more details.
He repeatedly called for a "fair process", saying Trump called him earlier Monday to say "he is standing by me". For the good of the court and the good of the country, Judge Kavanaugh must withdraw his nomination.
Republicans viewed the demands for an investigation, and Ford's various requests, as a way to delay voting on Trump's nominee.
Speaking on CBS This Morning, White House senior adviser Kellyanne Conway added: "This is starting to feel like a vast left-wing conspiracy". CNN reported on the outreach to Keyser and her lawyer's response on Saturday. He's also denied new accusations by a woman who says he exposed himself to her while they were students at Yale.
Ramirez was initially hesitant to speak publicly, she told the magazine, partly because her memory contained gaps because she had been drinking at the time of the alleged incident.