WASHINGTON — The Supreme Court on Thursday appeared likely to reject former President Donald Trump’s claim of absolute immunity from prosecution over election interference, but several justices signaled reservations about the charges that could cause a lengthy delay, possibly beyond November’s election.

A majority of the justices did not appear to embrace the claim of absolute immunity that would stop special counsel Jack Smith’s prosecution of Trump on charges he conspired to overturn his 2020 election loss to Democrat Joe Biden. But in arguments lasting more than 2 1/2 hours in the court’s first consideration of criminal charges against a former president, several conservative justices indicated they could limit when former presidents might be prosecuted, suggesting that the case might have to be sent back to lower courts before any trial could begin.

Justice Samuel Alito said that “whatever we decide is going to apply to all future presidents.”

The timing of the Supreme Court’s decision could be as important as the outcome. Trump, the presumptive 2024 Republican presidential nominee, has been pushing to delay the trial until after the election, and the later the justices issue their decision, the more likely he is to succeed. If Trump regains the presidency, he could order the Justice Department to dismiss the case, or possibly, as two justices suggested, pardon himself if convicted.

Since conservatives on the court gained a supermajority with the confirmation of three Trump appointees, they have cast aside decades-old long precedent on abortion and affirmation action. Now Trump is asking them to rule that one of the fundamental tenets of the American system of government — that no person is above the law — should be rejected as well, at least as it applies to him.

The active questioning of all nine justices left the strong impression that the court was not headed for the sort of speedy, consensus decision that would allow a trial to begin quickly.

Justices Neil Gorsuch and Brett Kavanaugh, two of Trump’s three high court appointees, and Alito said their concern was not the case against Trump, but rather the effect of their ruling on future presidencies.

Each time Justice Department lawyer Michael Dreeben sought to focus on Trump’s actions, these justices jumped in. “This case has huge implications for the presidency, for the future of the presidency, for the future of the country,” Kavanaugh said. The court is writing a decision “for the ages,” Gorsuch said.

Justice Amy Coney Barrett, the other Trump appointee, seemed less open to arguments advanced by Trump lawyer D. John Sauer, searching for a way a trial could take place.

Smith’s team is asking for a speedy resolution. The court typically issues its last opinions by the end of June, about four months before the election. U.S. District Judge Tanya Chutkan, who would preside over the trial, said pre-trial issues could take up to three months.

The court has moved very quickly in prior cases involving presidential power, deciding the Watergate tapes case against President Richard Nixon just 16 days after arguments. Earlier this year, it took the justices less than a month to rule unanimously that states couldn’t kick Trump off the ballot.

Trump, the first former president charged with crimes, had said he wanted to be at the Supreme Court on Thursday. Instead, he was in a courtroom in New York, where he is standing trial on charges that he falsified business records to keep damaging information from voters when he directed hush money payments to a former porn star to keep quiet her claims that they had a sexual encounter.