Fifty two percent of respondents in The Associated Press-NORC Center for Public Affairs Research poll released early Sunday are in favor an independent investigation. Roughly one-quarter of respondents, 23 percent, are opposed and 22 percent did not have an opinion.

Along party lines, pollsters found that more than three-quarters of Democrats back an independent probe, compared with one-quarter of Republicans.

Almost half of Americans, 44 percent, said they are concerned that Trump or other campaign aides had inappropriate contact with Russia, according to the poll. More than one-third, 36 percent, said they are not concerned.

Trump has said “fake news” is trying to push a narrative of collaboration between his campaign and Moscow.