Joe Biden and Donald Trump’s resounding Super Tuesday victories continue the inevitable push for a rematch in November’s US presidential election.

The current and former U.S. president is coming off a strong showing in the race for the Democratic and Republican nominations in 15 states and one overseas territory, the largest single Election Day before November.

In total, more than a third of delegates were at risk on Tuesday.

Neither candidate has enough delegates to formally cement their victory in the nominating race, and both will need to wait until later this month.

But the vote count shows that a rematch between Biden and Trump is almost a certainty.

Will November be another Biden vs. Trump showdown?

Biden lost only one primary or caucus — a caucus on the small island of American Samoa to previously unknown candidate Jason Palmer. But he won other states in landslides.

Trump, meanwhile, lost only Vermont to his last opponent, Nikki Haley, who added the state to her lone victory in Washington, D.C., last week. The former president won every other state contest, some by overwhelming majorities.

By Wednesday morning, Ms. Haley was preparing to formally withdraw from the race.

According to the Associated Press, Trump received 83.2% of the vote in Alabama. He also won states such as Massachusetts and Maine, where large numbers of moderate voters supported Ms. Haley in previous primaries.

While Trump no longer has any opponents in the race, he needs 1,215 delegates to officially win the Republican nomination. Currently, he has 995 votes, which means he will have to wait until at least Tuesday, March 12, to win the nomination.

Biden, meanwhile, has 1,497 delegates and needs a total of 1,968 delegates to clinch the nomination. He has until at least March 19 to reach that threshold.

What do their opponents say?

Biden is expected to win a resounding victory because he faces no serious challenge for the nomination. He did, however, face a protest vote from voters angry at his support for Israel in its war with Hamas.

Instead of voting for him, thousands of voters across the United States voted “no commitment” or “no preference” in protest of his support for Israel.

Nearly one in five Minnesota voters (18.9%) did not vote on Super Tuesday, a total of about 45,000 people. In North Carolina, more than 1 in 10 voters submitted a protest ballot — following a similar poll of undecided voters in Michigan in February.

“Tonight’s data shows that President Biden cannot win our votes with words alone,” said a spokesperson for the Minnesota Vote Uncommitted campaign.

More than 30,000 people have been killed in Gaza since the Oct. 7 attack, when militants killed 1,200 people and took hundreds more hostage, according to the Hamas-run health ministry. Health officials said more than 70,000 people have been injured in the enclave.

Trump is expected to win the Republican nomination while his last rival suspends his campaign.

But her campaign said the results showed many Republicans had “deep concerns about Donald Trump.”

However, former South Carolina Governor Nikki Haley is expected to announce her withdrawal from the race at 10am ET (3pm GMT) on Wednesday, according to people familiar with the matter.

Ms. Haley is not expected to endorse a candidate on Wednesday, sources said, but she may encourage Mr. Trump to win over Republicans and independents who voted for her.

Which states are voting next?

March is a busy month for primaries and caucuses, with Democrats voting in Hawaii on Thursday and in Georgia, Mississippi and Washington state on Tuesday, March 12.

Mr. Biden is likely to clinch the nomination after four primaries on Tuesday, March 19, in Arizona, Illinois, Kansas and Ohio.

Republicans, meanwhile, will head to the polls on Tuesday, when they cast their votes in Georgia, Hawaii, Mississippi and Washington state. After that, Trump is likely to officially become the Republican candidate.

The US presidential election is scheduled for Tuesday, November 5.