Addressing Ford, the California Democrat said, "Before you get to your testimony - and the chairman chose not to do this - I think it's important to make sure you're properly introduced". Chuck Grassley, a Republican from Iowa, has said the committee's own investigation will suffice.
In a freakish confirmation process, which now includes accusations of high school rape parties, much will hang on the testimony given by Kavanaugh and Ford on Thursday.
A woman has come forward with new allegations about Supreme Court nominee Brett Kavanaugh, accusing him of inappropriate behavior while he was in high school.
"It's possible I'll hear that and I'll say, 'Hey, I'll change my mind, '" Trump said.
Opening the session on Thursday morning, Republican senator Chuck Grassley thanked both Kavanaugh and his accuser, Christine Blasey Ford, for appearing before the committee.
Absent from the hearing will Mark Judge, who Ford said was also in the room participating in the alleged assault, or other witnesses. "I don't know who this is and this never happened". "My responsibility is to tell the truth", she added, adding that she was "terrified" to testify but that she considered it her "civic duty" to relate the details of the incident. The decision prompted an outcry from Democrats, whose 10 panel members include four women, given that senators typically do the questioning themselves.
"I am here today not because I want to be".
"What I find most inexcusable is this rush to judgment, the unwillingness to take these kinds of allegations at face value and look at them for what they are: a real question of character for someone who is asking for a lifetime appointment on the Supreme Court", Feinstein said.
She alleged Kavanaugh and Judge were "drunkenly laughing during the attack", which she maintained "has drastically altered" her life.
Later, the judiciary committee said it had received a fourth allegation, this time in a letter from an anonymous source who said their daughter and others had witnessed Kavanaugh physically assault a woman while intoxicated in Washington in 1998, shoving her "up against the wall very aggressively and sexually".
In recent days, the president has grown increasingly frustrated with the handling of the claims against Kavanaugh, said a person familiar with his views who was not authorized to discuss private conversations publicly.
"Brett groped me and tried to take off my clothes". Alas, the New York Times could not independently corroborate even one of her claims, and said Avennati declined to make her available for an interview.
Supreme Court nominee Brett Kavanaugh testifies before the Senate.
Mr Trump's remarks underscored the complexity of the moment, as Republicans seek to continue their efforts to install conservatives on the high court. "They have haunted me [and] been seared into my memory and have been hard to beat episodically as an adult", she said through tears'.
"I lament how this hearing has come about", he added, noting that Ford's allegations emerged only after Kavanaugh's original confirmation hearing earlier this month was over.
Deborah Ramirez, who accused Kavanaugh of exposing himself to her while at a dorm party during their freshman year at Yale University, shared her message through her attorney's twitter account. He ended up attending that Ivy League School.