The gap between the number of voters identifying as Democrats versus Republicans has grown to its highest level since 2012.
The Gallup poll also found striking partisan divergence on the threat of China, climate change and illegal immigration.
A new Gallup poll has reported plummeting Republican belief that the U.S. is globally respected and satisfaction in the country's global role.
The Harvard CAPS-Harris Poll also showed a double-digit decline in the number of Americans who believe the country is headed in the wrong direction.
Trump's favorability rating record was 49 percent, according to Gallup. Biden's now stands at 55 percent.
Partisan loyalties determine Americans' view of the deadliness of the disease, Gallup poll finds.
Two-third of Americans view China unfavorably, the highest level since the Pew Research Center began conducting the poll in 2005.
A Gallup poll found the number of Americans worried about the coronavirus pandemic has surged over the past month.
Around 45 percent of Americans of any party identity would vote for a socialist, according to the poll.
Surveys show that people around the world have less confidence and far more concern about American leadership under the Trump administration.
Meanwhile, almost three-quarters say they will be better off financially within the coming year.
The poll results from Gallup also show the president's approval rating broke records in terms of polarization.
The president's approval rating has risen 4 percentage points since he took office in 2017.
The latest Gallup survey found 51 percent of Americans did not want the Senate to remove the president from office.
Trump is admired by more Americans as 2019 draws to a close than he was at the end of his first two years in office.
Gallup has released the results of a new survey that shows a majority of American workers aren't satisfied with their jobs.
The poll found that overall, 46 percent of U.S. adults are "very" or "somewhat" worried about becoming a victim of terrorism and 45 percent are similarly concerned about a mass shooting.
President Donald Trump and former President Barack Obama have the exact same overall approval rating, 42 percent, at the two-and-a-half-year mark of their respective time in office.
A new poll shows that a majority of Americans believe at least one in four people are gay or lesbian.
It is a threefold increase from five years ago.
The number of Americans who view the countries favorably declined by 12 percent.
"The public is solidly against the expansion of the border walls and remains sympathetic toward immigrants in the country illegally," said polling expert Jim Norman.
Half of U.S. high school students and teachers said they have little or no trust in the news media to report events accurately and without bias, a series of nationwide surveys found.
Rasmussen has consistently been more favorable to Trump than other polls.