The Redfield & Wilton Strategies poll found that 58 percent of eligible voters don’t believe Biden should run for president in 2024, with 42 percent of them citing his age as the most significant reason.

Just 30 percent said Biden should seek re-election in two years and 12 percent responded that they didn’t know in the poll conducted on December 5 among 1,500 eligible voters.

Biden turned 80 on November 20 and became the first serving octogenarian president. He is also the oldest candidate ever elected president and will be 81 at the time of the next presidential election.

His age wasn’t the only reason that voters cited but it had a substantial lead over other issues, including Biden’s economic policies at 16 percent, strengths of other potential Democratic candidates at 7 percent, and the 2022 midterm results at 1 percent.

Biden has not made any formal announcement of a 2024 campaign but he has previously indicated that he intends to run and that Vice President Kamala Harris will be his running mate again.

Meanwhile, former President Donald Trump formally announced his 2024 campaign following the November midterm elections in a widely expected move.

The Redfield & Wilton Strategies poll found that 49 percent of eligible voters do not want Trump to run again in 2024, while 39 percent said that they wanted him to run and 11 percent didn’t know.

Thirty-nine percent of those who opposed another Trump run cited his response to the 2020 presidential election as the most significant reason. Trump has continued to falsely claim that the last presidential election was stolen from him through mass voter fraud and other irregularities.

A further 10 percent cited Trump’s ability to provoke heated opposition from Democrats in the Redfield & Wilton Strategies poll, while just 8 percent said the former president’s age was the most significant reason for opposing his 2024 run.

Trump is 76 and will be 78 by the time of the next presidential election. During his time in office, he was the oldest serving in U.S. history and was 70 when he won the 2016 election.

The official process for nominating presidential candidates won’t begin until early 2024 but the procedure will look different for Democrats and Republicans after Biden’s party decided to make the South Carolina primary the first one on their calendar.

However, Republicans are sticking to the long-established method of beginning with the Iowa caucus.

Newsweek reached out to the White House for comment.