Supreme Court nominee Amy Coney Barrett has said she cannot commit to recusing herself from any cases involving disputes that may arise from the US presidential election.

Ms Barrett told the Senate Judiciary Committee: "I can't offer an opinion on recusal without short-circuiting that entire process."

The judge said she had not spoken to President Donald Trump or anyone else in the administration about how she would handle any election-related challenges. And she said she would have to confer with the other justices on the court before deciding.

Ms Barrett is on Capitol Hill for a second day of hearings.

The mood is likely to shift to a more confrontational tone as Ms Barrett, an appellate court judge with very little trial court experience, is grilled in 30-minute segments by Democrats strongly opposed to Mr Trump's nominee.

Republicans are rushing her to confirmation before polling day in the US election.

The committee chairman, Lindsey Graham, opened the session under coronavirus protocols with a focus on healthcare, and ending the Affordable Care Act.

Mr Graham also quickly asked if the Catholic judge would be able to shelve her personal beliefs to adhere to law.

"I can. I have done that," she said. "I will do that still."

Mr Graham praised her as a conservative woman of faith and the best possible nominee Mr Trump could have chosen.

"I will do everything I can to make sure that you have a seat at the table. And that table is the Supreme Court," Mr Graham said.

The Senate, led by Mr Trump's Republican allies, is pushing Ms Barrett's nomination to a quick vote before November 3, and ahead of the the latest challenge to the "Obamacare" Affordable Care Act, which the Supreme Court is to hear a week after the election.

Republicans also hope to seat Ms Barrett quickly enough to hear any legal challenges after the election.