The nationwide poll of 1,250 U.S. adults showed Trump leading Biden 40% to 34% with the rest unsure or planning to vote for someone else or no one. The poll had a margin of error of three percentage points.

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Seventy percent of respondents - including about half of Democrats - agreed with a statement that Biden should not seek re-election. Fifty-six percent of people responding to the poll said Trump should not run, including about a third of Republicans.

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Three-quarters of poll respondents agreed with a statement that Biden was too old to work in government, while half said the same about Trump, who at 77 would also be among the oldest U.S. leaders ever if returned to the White House. Just over half of Democrats saw Biden as too old while a third of Republicans viewed Trump that way.