Donald Trump. Win McNamee/Getty Images President Donald Trump's approval rating fell to a new low on Wednesday, dropping to 34% from 37%, according to a poll conducted by Quinnipiac University released Wednesday.

The poll found that 57% of voters disapproved of the president's performance, a figure approaching Trump's record high of 58% from April.

Trump's approval rating was heavily correlated with party affiliation — 81% of Republican respondents said they approved of Trump's performance, while a paltry 4% of Democrats said the same. Trump earned praise from 35% of independents.

The poll caps a two-week period fraught with unpopular moves by the president. Last week, Trump announced his intent to withdraw the US from the Paris Agreement on climate change, a move that 62% of poll respondents disapproved of. The president also earned scorn for criticizing the mayor of London in the aftermath of a deadly terrorist attack there.

The poll also comes amid mounting scrutiny surrounding the FBI's investigation into Trump's associates' ties to Russia and whether there was collusion to influence the 2016 election. James Comey, the FBI director whom Trump fired in May, will testify before the Senate Intelligence Committee on Thursday, where he plans to detail some of his private interactions with Trump.

The poll's numbers reflect the public's increasing distrust regarding Trump's connections to Russia — 31% of respondents said they thought Trump did something illegal in dealing with Russia, and 29% said he did something unethical but not illegal.

When voters were asked about Trump's campaign advisers, 40% said they thought the advisers did something illegal in dealing with Russia, and 25% said they did something unethical but not illegal.

More than two-thirds of voters, 68%, reported feeling very or somewhat concerned about Trump's relationship with Russia. And 54% said the president was too friendly with the foreign power.

About one-third of respondents, 32%, said Trump did nothing wrong with Russia.

"There is zero good news for President Donald Trump in this survey, just a continual slide into a chasm of doubt about his policies and his very fitness to serve," Tim Malloy, assistant director of the Quinnipiac poll, said in a statement.