A majority of American adults in a new poll thinks President Trump has tried to interfere in the investigation into the Russian meddling in the U.S. presidential race.

An Associated Press/NORC Center for Public Affairs Research poll found about 60 percent of Americans think Trump attempted to obstruct or impede the investigation.

But opinions are largely split among partisan lines, with only about 25 percent of Republicans saying they think Trump tried to meddle in the probe.

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The poll also finds that 68 percent of Americans are at least moderately concerned Trump or his campaign associates had inappropriate links to Russia. Just about 30 percent of Americans said they were not concerned.

Only 22 percent of Americans support Trump's decision to fire former FBI Director James Comey, compared with the more than half of Americans who disapprove of the president's decision.

Slightly more than one-quarter of Americans are very or extremely confident the investigation led by special counsel Robert Mueller into the Russian election meddling can be impartial and fair. Another 36 percent of Americans are moderately confident it can be.

The poll was conducted from June 8 to 11 among 1,068 adults. The margin of error is 4.1 percentage points.

The poll follows a report Wednesday that Mueller's team is now looking into whether Trump sought to obstruct justice.