U.S. President Donald Trump hosts a roundtable discussion with small business owners and members of his administration in the Roosevelt Room at the White House December 06, 2019 in Washington, DC.

American voters are nearly evenly divided over the impeachment of President Donald Trump, views that have gone unchanged since last month despite weeks of long debates and public hearings, according to a new NPR/PBS NewsHour/Marist poll.

Forty-eight percent of voters are against the president's impeachment, while 47% support it. Trump is accused of abusing his power by pressuring the Ukraine president to investigate political rival and former Vice President Joe Biden.

"It's like the hearings have never happened," said Lee Miringoff, director of the Marist Institute for Public Opinion. "The arguments have only served to reinforce existing views and everyone is rooting for their side."

The poll also found that Biden and Sen. Bernie Sanders are leading the Democratic presidential field. They collectively receive about half the support of Democratic voters and left-leaning independents.