Two of those liberal justices, speaking Friday at Princeton University, talked about the court's legitimacy, without mentioning their new colleague.
Protesters vented their anger in the hallways of Senate office buildings, on the steps of the US Capitol and in front of the Supreme Court. The new justice's four clerks all are women, the first time that has happened.
In stressing Kavanaugh's frequent agreement with Judge Merrick Garland on the federal appeals court in Washington, the new justice's backers seem to be suggesting that Kavanaugh's vote can not be taken for granted.
White House officials now say they view the speech as a turning point that changed the momentum as it appeared Kavanaugh's nomination was at risk.
Protests against Kavanaugh - who will now serve a lifetime appointment after overcoming credible allegations of sexual assault, which he denied - continued outside the Capitol and Supreme Court during the ceremony. "I'll be the first justice in the history of the Supreme Court to have a group of all-women law clerks".
Collins, who showed up at the interview on Capitol Hill with a security detail, told Pelley that the whole situation has been "very hard", and that in her almost 22 years in the Senate, "this is as ugly a situation as I have ever seen".
While McConnell said Kavanaugh's confirmation was a shining moment for the Republicans, some party members weren't so sure.
The allegations against the nominee were "all made up, it was fabricated and it was a disgrace", Mr Trump said.
Justice Kavanaugh was confirmed by the Senate on Saturday, in a 50-48 vote that followed strictly partisan lines. It capped a fight that seized the national conversation after claims emerged that Kavanaugh had sexually assaulted women three decades ago.
The accusations transformed the clash from a routine struggle over judicial ideology into an angry jumble of questions about victims' rights and personal attacks on nominees.
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Allison remains in the concussion protocol, but McCarthy thinks (or perhaps hopes) that Allison will clear into time for the game. Rodgers held onto the ball to wait for receivers to get open, but they couldn't, and it led to three sacks and his two fumbles.
Centrist Republican Sen. Lisa Murkowski refused to cast a "yes" vote, but called out "present" instead of "no" so fellow Republican Steve Daines of Montana could skip the roll call and walk his daughter down the aisle on her wedding day. Joe Manchin of West Virginia. "We don't give up", he said. Republicans past year successfully stalled the process, meaning it fell to Mr Trump, not Barack Obama, to nominate the new justice.
There are two big no's to come out of the Kavanaugh hearing - one that has been around for a while, the other that has just joined.
Media captionTrump: "The main base of the Democrats have shifted so far left we'll end up being Venezuela".
"Take a look at the last one", he said.
"We live in this world where it's just the nine of us", Kagan said.
In early 2016, McConnell refused to set hearings for President Barack Obama's last nominee, Judge Merrick Garland, saying the seat left open by the death of Justice Antonin Scalia should be filled by the victor of that year's election.
Looking ahead, McConnell said Democrats certainly "could" refuse to hold any nominations of any kind should they regain control of the Senate, but argued it wouldn't be "sustainable politically". "We didn't attack Merrick Garland's background and try to destroy him".
It reflects a high water mark of the Trump presidency: Republican control of the White House, the Senate, the House of Representatives and the judiciary's top court. But when asked again Sunday about it, he sought to clarify that a Senate case in 1880 suggested inaction on a nominee only when the chamber was controlled by the party opposing the president.
But, of course, we also know that that investigation was severely restricted by the Republican majority on the Senate Judiciary Committee and by the Trump administration.
McConnell spoke on Fox News Sunday and CBS's Face the Nation.