By Phil Helsel and The Associated Press

Hawaii's four presidential electors have joined others in asking for more information about alleged Russian hacking of U.S. political institutions to sway the election before casting their ballots next week.

In a statement late Tuesday, the four Democratic electors asked President Barack Obama for the Central Intelligence Agency report into the cyber-attacks.

"The information contained in the report is essential to carrying out our constitutional obligation of casting our vote in an election that is free from tampering from outside entities," the statement said.

The request follows a letter from 10 electors from various states on Monday. The letter was posted online by California elector Christine Pelosi, daughter of House Minority Leader Nancy Pelosi, and more than 40 others have since been added, according to the site.

The Washington Post first reported on Friday that a secret CIA assessment concluded that Russia intervened in order to help Donald Trump win the White House, a report later confirmed by a congressional official.

NBC News reported Wednesday that U.S. intelligence officials are confident Russian President Vladimir Putin became involved in the covert operation.

The Russian government has denied involvement in any cyber-attacks or in any effort to influence the U.S. presidential election.

Related: Clinton Campaign Wants Intel Briefings for Electoral College Members

Electoral College electors will meet in their states to vote on Dec. 19. According to NBC News’ final count, Trump has 306 electoral votes compared to Hillary Clinton’s 232.

It's been widely described as highly unlikely that enough electors would go against the popular votes in their states to deny Trump the 270 electoral votes he needs for a presidential victory.

But if no candidate reaches that threshold the decision would go to the U.S. House of Representatives.

On Wednesday, a federal judge in Washington state denied a bid by two Democratic electors to avoid up to $1,000 in possible state fines if they cast ballots contrary to the popular vote, which went for Clinton.

Related: Why the CIA Thinks Russia Wanted Trump to Win

The electors, Bret Chiafalo and Levi Guerra, have said they would consider casting ballots for another Republican candidate, and in court papers have called Trump "unfit for office."

They also argue that Alexander Hamilton in the Federalist Papers said the Electoral College should stand as a check to prevent a dangerous or unqualified candidate from taking office.

Related: CIA Said to Conclude Russia Mounted Operation to Help Trump Win

Washington state officials countered in a filing that "Popular musicals notwithstanding, Alexander Hamilton’s views do not set the scope and function of the Electoral College" and that voters on Nov. 8 expected their electors would vote for the candidate who won.

District Judge James Robart said the motion filed on behalf Chiafalo and Guerra was speculative because they haven’t yet voted for anyone or been fined.

Robart said the two electors signed a written pledge to vote for Clinton if she won, and likened it to a contract.

"Your clients agreed to represent the will of the majority," Robart told their attorney. Attorneys for Chiafalo and Guerra on Wednesday filed a notice of appeal, according to court documents.