About 51% of American voters believe "that the Russian government has compromising information about President Trump," according to a Quinnipiac University poll released Tuesday.

Why it matters: Based on Trump's responses from the Helsinki press conference, lawmakers have expressed criticism as to whether Russian President Vladimir Putin holds damaging information over President Trump.

54% of voters say Trump was not acting in the best interest of the U.S. at the Helsinki summit.

say Trump was not acting in the best interest of the U.S. at the Helsinki summit. 73% say the summit was a success for Russia.

the summit was a success for Russia. 70% of Republicans don't believe there is compromising information against President Trump.

don't believe there is compromising information against President Trump. Trump’s approval rating is at 38% compared to 43% after the summit with North Korean leader Kim Jong-un, according to the poll.

compared to 43% after the summit with North Korean leader Kim Jong-un, according to the poll. 63% of voters are "very concerned" or "somewhat concerned" that the Russian government may try to interfere in the 2018 elections, as 36% are "not so concerned" or "not concerned at all."

The other side: Several polls have been released based on the effects of the Helsinki summit. One consistency is a majority of Republicans still back Trump's judgement.

From July 18 - 23, Quinnipiac University surveyed 1,177 voters nationwide, with a margin of error of +/- 3.5 percentage points, including design effect.