President Trump talks to reporters on the South Lawn of the White House Tuesday before boarding Marine One for a trip to Pennsylvania and Tennessee.
Mr Trump added he felt the cause would be "a rallying cry" for Republicans in the upcoming midterm elections.
Kavanaugh and Judge have vehemently denied all the allegations.
Members of the Senate Judiciary Committee voted on Friday in favor of Kavanaugh's nomination but a full Senate vote on confirmation was delayed for a week after President Donald Trump bowed to pressure from moderate members of his Republican Party for the Federal Bureau of Investigation probe. "As Kavanaugh well knows, in our legal system, even small lies matter", said a Monday op-ed in Politico by Demand Justice's Brian Fallon and Christopher Kang, who both worked in the Obama administration. She said Judge was also in the room. These articles claim the judge portrayed himself as a "choirboy" who, in the words of the New York Times, enjoyed "a beer or two as a high school and college student".
Mazie K. Hirono, Hawaii Democrat, who accused Judge Kavanaugh of a "paranoid fantasy". That means if all the Democrats vote against Kavanaugh, Trump could not afford to have more than one Republican oppose his nominee, with Vice President Mike Pence casting a tiebreaking vote.
The action came days after California college professor Christine Blasey (BLAH'-zee) Ford testified under oath in a Senate committee hearing Kavanaugh sexually assaulted her in high school in the 1980s. Jeff Flake of Arizona - also raised questions Tuesday about whether Kavanaugh has the right temperament to be on the high court.
At the conclusion of a sensational nomination hearing replete with nationally televised and debated accusations of sexual assault by Kavanaugh, who now sits on the U.S. Court of Appeals for the DC Circuit, the Committee on Friday advanced the nominee in an 11-10 party-line vote.
But the undecided senators - Flake, Lisa Murkowski of Alaska and Susan Collins of ME, all Republicans; and Heidi Heitkamp of North Dakota and Joe Manchin III of West Virginia, both Democrats - are keeping an open mind.
Asked what a vote of support for Kavanaugh sends to women, particularly from a female senator, Ernst said her positive vote shows women that "we are innocent until proven guilty". Kavanaugh denies the allegation.
His attorney, Barbara Van Gelder, confirmed that the Federal Bureau of Investigation has interviewed Judge.
Donald Trump defended his pick but conceded that the appeals court judge has had a "bit of difficulty" with alcohol.
The second letter says that while the questioning Kavanaugh faced was "of course painful", he chose to be "intemperate, inflammatory and partial" rather than assist senators trying to assess the allegation against him.
At a White House press conference, Trump said the treatment of Kavanaugh and his family by media and Democrats was "not describable".