More than 4 in 10 American adults surveyed in a new poll said President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE should be impeached, an uptick from a survey conducted last month.

Forty-five percent of respondents in the latest Reuters/Ipsos poll released Thursday said Trump should be impeached, while 42 percent said he should not. The rest were undecided.

The number of Americans supporting impeachment is up 5 percentage points from mid-April, according to the poll. The latest survey found greater support for impeachment among Democrats and independents.

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Still, more than half of respondents said they believe congressional investigations, led by Democrats, of the president for obstruction of justice, as well as inquiries into his finances, interfere with legitimate business of the federal government.

It wasn't clear, according to Reuters, whether Americans surveyed in the poll would prefer Democrats back off with their investigations or push forward aggressively and quickly move towards filing articles of impeachment.

Congress gets low marks in the poll as well: Just 32 percent of Americans said they thought lawmakers on Capitol Hill treated the results of the special counsel investigation fairly, while 47 percent said that they did not.

The president's approval ratings in the poll remained largely underwater and unchanged from last month's poll: 55 percent of adults disapprove of the job Trump is doing in the White House, while 39 percent approve.

The online poll conducted by Reuters/Ipsos gathered results from 1,006 adults living in the U.S., and has a credibility interval of 4 percentage points. The poll was conducted on May 6.