Donald Trump has dropped one of his strongest hints yet that he may run for the White House again.
The former US president told a crowd in Iowa, that he will "very, very, very probably do it again" in 2024.
US President Joe Biden is also travelling across the country to get out the vote.
Neither Biden nor Trump is on the ballot next Tuesday when American voters will decide the balance of power in the US Congress and key state governorships.
But the midterms will set the US political landscape ahead of the presidential election in two years' time.
"I ran twice," he said. "I won twice, and did much better the second time than I did the first, getting millions more votes in 2020 than I got in 2016."
"And likewise, getting more votes than any sitting president in the history of our country by far."
Trump did win the most votes ever - 72 million - for a sitting president in 2020, but still lost to the challenger, Biden, a Democrat, who pulled in 81 million.
Biden - who campaigned on Thursday in New Mexico and California - has reportedly been meeting senior advisers to plan his potential 2024 re-election campaign, setting up a possible rematch with Trump.