Kavanaugh, 53, has been a judge on U.S. Circuit Court of Appeals for the District of Columbia Circuit in Washington, D.C. since 2006.
"We are going and mobilizing where we have leverage", said Mallory Quigley, a spokeswoman for the group.
The opinion piece, which was written by the judge's friend Julie O'Brien, focused on the mundane and normal tasks Kavanaugh carries out on behalf of his daughter and her sixth-grade basketball team, as well as her school's community. "He will make a superb Justice of the Supreme Court of the United States".
Republicans and Democrats are at odds over Kavanaugh and with the Senate closely divided, his path to confirmation is treacherous.More news: Thai cave rescue: Four more boys extracted in second operation
"Not only did Mr. Kavanaugh say that a president should not be subpoenaed, he said a president shouldn't be investigated", Schumer said.
"We know #KavanaughSCOTUS is an extremist who has been expressed disturbing views on presidential power and would criminalize abortion".
Trump worked hard to keep news of Kavanaugh's nomination from leaking, though several news organizations confirmed it in the minutes leading up to the announcement.
Senator Richard Blumenthal, a Democrat from CT and a member of the Judiciary Committee, said his colleagues should press Kavanaugh to commit to recusing himself from cases involving Mueller's investigation.
The Senate minority leader, Chuck Schumer, has a theory about why Donald Trump settled on Judge Brett Kavanaugh. "A more conservative majority could be more willing to uphold state restrictions on abortion, if not overturn the 45-year-old landmark Roe v. Wade decision that established a woman's constitutional right".More news: A new - and affordable - Microsoft Surface tablet might arrive this week
A confirmation for Judge Kavanaugh would mean "women's reproductive rights would be in the hands of five men on the Supreme Court", he added.
Kennedy was generally perceived as the Court's center, serving as the key swing vote in 5-4 cases that otherwise split the Court's four liberal and four conservative justices.
And while all this was going on back in Washington, the promise-keeper was on Air Force One for a day-flight to Europe, where he will dun the deadbeat Albanians and Portuguese and Luxembourgeois to pay for their tranche of the stale North Atlantic Treaty Organisation torte, and where he may just ask Vladimir Putin whom he should nominate the next time there is an opening on the Supreme Court. He needs only one Republican to switch if Arizona Sen. In a 2009 article in The Minnesota Law Review, Kavanaugh wrote that presidents are under such extraordinary pressure they "should be excused from some of the burdens of ordinary citizenship while serving in office".
Kavanaugh has suggested that Congress should pass a law to prevent a president from any legal action, private or public, except impeachment as provided by the Constitution. Just one flipped G.O.P. vote could sink Kavanaugh's chances.
Richard Primus, the Theodore J. St. Antoine Collegiate Professor of Law at the University of MI, said absent an unexpected change in the composition of the Senate or a scandal, it's likely Kavanaugh will be confirmed despite any Democratic opposition.More news: France have the edge over Belgium to make it to the final
"This is an opportunity for senators to put partisanship aside and consider his legal qualifications with the fairness, respect, and seriousness that a Supreme Court nomination ought to command", McConnell said.