An FBI report into sexual misconduct allegations against US Supreme Court nominee Brett Kavanaugh has been received by the Senate Judiciary Committee and will now be reviewed ahead of a key procedural vote tomorrow.

White House spokesman Raj Shah said on Twitter that the administration also received the FBI's report and was "fully confident" the Senate would approve his nomination.

The White House found no corroboration of the allegations against Mr Kavanaugh in the report, the Wall Street Journal reported, citing people familiar with the matter.

Senator Chuck Grassley, the head of the Judiciary Committee, said on Twitter that he and the panel's top Democrat, Dianne Feinstein, have agreed to "alternating equal access for senators to study the contents" of the FBI report.

Senator Grassley said in a statement: "There's nothing in it that we didn't already know. This investigation found no hint of misconduct."

Senator Grassley said it was time to proceed to a vote by the full Senate on President Trump's nominee to sit on the nation's highest court.

"Judge Kavanaugh should be confirmed on Saturday," Senator Grassley told reporters.

"Hopefully, we're 48 hours away from having a new person on the Supreme Court," he added.

However, Senator Feinstein said the report looks like the product of an incomplete investigation while one source told Reuters that there were "no bombshells" in the document.

The FBI report was sent to the White House and Senate just hours after Republican Senate Majority Leader Mitch McConnell took steps last night to force a procedural vote on the nomination one hour after the Senate convenes tomorrow.

Senator McConnell filed a petition for a so-called cloture vote, which if successful would limit debate on the nomination and start the clock ticking on a final 30-hour waiting period before a Senate confirmation vote.

After filing a cloture petition, politicians must wait one legislative day before proceeding to a vote, according to Senate rules. A closure vote could come tomorrow morning at the soonest.

Christine Blasey Ford, a college professor from California has accused Mr Kavanaugh of assaulting her in 1982 when they were high school students.

Her attorneys said she was not contacted by the FBI for the latest report.

Read More:
Americans transfixed by Kavanaugh hearing

Trump under fire over Blasey Ford comments at campaign rally
Trump calls Kavanaugh allegations 'scary time' for men   
US President orders 'supplemental' FBI investigation on Kavanaugh 

Several people with information related to allegations against Mr Kavanaugh told Reuters they had not heard from the FBI, suggesting its report may be narrower than was desired by some lawmakers who demanded it just days ago.

With the report's conclusions as yet unclear, a partisan struggle over it has been developing.

President Trump and the Senate Republican leadership are battling to corral enough support for a majority vote for Mr Kavanaugh, while Democrats are in near unanimity against him.

Three Republicans who could be key to whether Mr Kavanaugh is confirmed - Senators Jeff Flake, Susan Collins and Lisa Murkowski - criticised President Trump for mocking Ms Ford at a political rally in Mississippi on Tuesday.

Dr Ford, who testified last week at before a Senate Judiciary Committee hearing, said she could not remember the precise date or location of the alleged assault or how she got home later, but offered a detailed account of the incident.

Imitating her testimony, Mr Trump said: "What neighbourhood was it in? I don't know. Where's the house? I don't know. Upstairs, downstairs, where was it? I don't know. But I had one beer. That's the only thing I remember."

"And a man's life is in tatters," Mr Trump added.

Mr Flake told NBC's "Today" show that "there's no time and no place for remarks like that, that discuss something this sensitive at a political rally ... It's kind of appalling."

A day after the hearing, Mr Trump had called Ms Blasey Ford "a very credible witness" who provided "very compelling" testimony.

Mr Kavanaugh has denied her accusation as well as allegations by two other women, all dating from the 1980s, while accusing Democrats of a political "hit".

In Washington this evening, protesters have occupied a senate office building on Capitol Hill calling on Senators to vote against Mr Kavanaugh.

It comes as thousands of women - many of them survivors of sexual assault - marched on the US Supreme Court.

Marchers decried a process they said was designed to exculpate the powerful.

Carrying signs that read "Women must be heard" or simply "Kava Nope," protesters marched from Washington's District Court to the steps of high court, chanting along the way.