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WASHINGTON - (AP) -- Members of the Senate Judiciary Committee will begin questioning Supreme Court nominee Brett Kavanaugh on Wednesday, after the first day of the hearing was marked by quarreling and confusion between Democrats, Republicans, and protesters.

Democrats raised objections from the moment Chairman Chuck Grassley gaveled the committee to order. One by one, Democrats, including Kamala Harris of California, Cory Booker of New Jersey and Amy Klobuchar of Minnesota, all potential presidential contenders, demanded that Republicans delay the hearing. They railed against the unusual vetting process by Republicans that failed to include documents from three years Kavanaugh worked in the George W. Bush administration, and 100,000 more pages withheld by the Trump White House. Some 42,000 pages were released on the evening before of the hearing.

"We cannot possibly move forward, Mr. Chairman, with this hearing," said Harris at the top of proceedings. Grassley disagreed.

Sen. Richard Blumenthal, D-Conn., made several motions to adjourn, saying if the confirmation continued, "this process will be tainted and stained forever."

Grassley denied multiple requests to postpone, defending the document production as the most open in history. He said the chaotic scene was something he'd "never gone through" in 15 past confirmation hearings.

Strong Democratic opposition to President Donald Trump's nominee reflected the political stakes for both parties just two months before congressional elections. The Democrats, including several senators poised for 2020 presidential bids, tried to block the proceedings over Kavanaugh records being withheld by the White House. Republicans, in turn, accused the Democrats of turning the hearing into a circus.

California Sen. Dianne Feinstein says Democrats want to do a good job and are not trying to "create a disruption" by asking for more time to review Kavanaugh's documents. She says they're asking: "Majority, give us the time to do our work."

Rebuffed in their request to delay the hearing, Democrats are planning to shine a light on Kavanaugh's views on abortion, executive power and whether Trump could be forced to testify as part of special counsel Robert Mueller's Russia investigation.

More than two dozen protesters, shouting one by one, disrupted the hearing at several points and were removed by police. "This is a mockery and a travesty of justice," shouted one woman. "Cancel Brett Kavanaugh!" Others shouted against the president or to protect abortion access. "Senators, we need to stop this," called out one.

As patience thinned and tempers flared, Sen. John Cornyn, R-Texas, denounced what he called the "mob rule." Struggling to speak over protesters, Sen. Orrin Hatch, R-Utah, said: "These people are so out of line they shouldn't be in the doggone room."

As protesters repeatedly interrupted the session, Republican Sen. Ted Cruz, who is fighting for his own re-election in Texas, apologized to Kavanaugh for the spectacle he said had less to do about the judge's legal record than Trump in the White House.

"It is about politics," said Cruz. "It is about Democratic senators re-litigating the 2016 election."

In his opening remarks, released ahead of delivery, Kavanaugh sought to tamp down the controversy over his nomination, which would likely shift the closely divided court to the right. He promised to be a "team player" if confirmed, declaring that he would be a "pro-law judge" who would not decide cases based on his personal views.

Kavanaugh declared he would be even-handed in his approach to the law.

"A good judge must be an umpire, a neutral and impartial arbiter who favors no litigant or policy," Kavanaugh said. "I would always strive to be a team player on the Team of Nine."

The Supreme Court is often thought of as nine separate judges, rather than a team. And on the most contentious cases, the court tends to split into conservative and liberal sides. But justices often say they seek consensus, and they like to focus on how frequently they reach unanimous decisions.

After hours silently listening to the partisan exchanges, Kavanaugh rose to be sworn in and give opening remarks. He stressed the court's independence at a time when Democrats say he was picked because Trump believes the judge's expansive views of executive power will help the president in investigations.

"Our independent Judiciary is the crown jewel of our constitutional republic," Kavanaugh told the senators. "The Supreme Court is the last line of defense for the separation of powers and the rights and liberties guaranteed by the Constitution."

Kavanaugh said that the Supreme Court must "never, never be viewed as a partisan institution" and promises that if confirmed he will "keep an open mind in every case."

Trump said in a Tweet on Tuesday that Kavanaugh is "one of the most highly renowned jurists to ever appear before Congress."

Sen. Dick Durbin, D-Ill., told Kavanaugh that the unprecedented opposition being shown at the hearing reflected the concern many Americans, have over Trump's "contempt of the rule of law" and the judge's own expansive views on executive power.

"It's that president who's decided you are his man," Durbin said. "Are people nervous about this, concerned about this? Of course they are."

The panel's top Democrat, Sen. Dianne Feinstein, sought to provide context for her party's frustration.

"These are very unique circumstances. Not only is the country deeply divided politically, we also find ourselves with a president who faces his own serious problems," she said referring to investigations surrounding the president. "So it's this backdrop that this nominee comes into."

Kavanaugh, 53, has served for the past 12 years on the federal appeals court in Washington, D.C., and conservative record includes a dissenting opinion last year that would have denied immediate access to an abortion for an immigrant teenager in federal custody.

A particular issue for senators are documents from the years Kavanaugh worked in key positions in the Bush White House and a member of independent counsel Kenneth Starr's legal team that investigated President Bill Clinton in the late 1990s, leading to Clinton's impeachment.

Those years produced an unusually long public record. Republicans in the Senate only sought to review his years in the White House counsel office, rather than his three years as staff secretary, which Democrats say could shed light on his view on key Bush-era policies including the detention and interrogation of terror suspects, same sex marriage and other issues.

Many Democratic senators already have announced their intention to vote against Kavanaugh and many Republicans have likewise signaled their support. A handful of Democrats seeking re-election in states Trump carried in 2016 could vote for Kavanaugh.

Sens. Susan Collins of Maine and Lisa Murkowski of Alaska are the only two Republicans even remotely open to voting against Kavanaugh, though neither has said she would do so. Abortion rights supporters are trying to appeal to those senators, who both favor abortion access.

Democrats have been under intense pressure from liberal voters to resist Trump, and many remain irate, even two years later, over the treatment of Merrick Garland, President Barack Obama's nominee for the Supreme Court. Garland was denied so much as a hearing last year by Majority Leader Mitch McConnell.

Kavanaugh worked for Justice Anthony Kennedy, who retired at the end of July. Questioning of Kavanaugh will begin Wednesday, and votes on the Senate floor could occur this month.

Senate Judiciary Chairman Chuck Grassley says the Senate could confirm Supreme Court nominee Brett Kavanaugh in time for the new court term that begins Oct. 1.