"We make this request because of the A.B.A.'s respect for the rule of law and due process under the law", Carlson wrote in the letter Thursday, calling the appointment one that is "simply too important to rush to a vote".
Through a spokeswoman, Maryland Gov. Larry Hogan said Kavanaugh's nomination should not proceed without a full investigation of the allegations.
The Arizona Republican had said in a statement that he would vote in favor of Supreme Court nominee Brett M. Kavanaugh, when on his way to the Judiciary Committee meeting room on Friday, Ana Maria Archila and Maria Gallagher put themselves right in front of him, and right in his face.
The Senate vote to recommend that Brett Kavanaugh be confirmed to the vacant seat on the US Supreme Court had appeared to be an inevitability.
She begged Senator Flake to look her in the eye.
Republicans control the Senate by a narrow 51-49 majority.
All the Republicans voted in favour, while all the Democrats voted against.
The committee said the supplemental FBI background investigation would be "limited to current credible allegations against the nominee".
Just in: After Senate Republican leaders agreed to delay Judge Brett Kavanaugh's confirmation vote, Senate Judiciary Chairman Chuck Grassley has formally requested that the White House conduct a "supplemental Federal Bureau of Investigation background check".
Ford welcomed the FBI investigation, one of her lawyers said.
Kavanaugh told the committee it won't be just his confirmation that is affected by this chaotic process. Patrick Leahy, D-Vt., asked Ford for her strongest memory.
"They were laughing with each other", Ford said.
When asked by reporters earlier this week whether there should be a full FBI investigation into the allegations, Murkowski responded, "It would sure clear up all the questions, wouldn't it?" On the other side, there are 47 Democrats voting against Kavanaugh, with Manchin and Montana's Heidi Heitkamp still publicly undecided.
There were signs that Thursday's remarkable testimony before the panel - in which Kavanaugh angrily declared his innocence and Ford calmly recounting the moment in which she says he attacked her - had registered negatively with two organizations whose support Kavanaugh had earlier received.