The Republican and Democratic conventions appear to have hurt the GOP and benefited the Democrats, according to new polls.

Gallup's polling showed 52 percent of Americans surveyed held a less favorable opinion of the GOP as a result of its convention, as compared to 35 percent of respondents who had a more favorable opinion of the Republican Party afterward.

Americans were nearly evenly split about the impact of the Democratic convention, however. Forty-four percent of respondents to Gallup's survey held a more favorable view of the Democratic Party following its convention, compared to 42 percent of respondents who viewed it less favorably afterward.

Furthermore, respondents indicated that they were slightly more likely to support Hillary Clinton as a result of the Democratic convention, 45 percentage points more likely to 41 points less likely. But 51 percent of respondents said the GOP convention made them less likely to support Donald Trump, and 36 percent of Americans said the Republican convention made them more likely to support him.

In the last 20 years of Gallup's polling about Americans' feelings of Republican nominees after the conventions, only Trump turned off more people than he made more likely to vote for him. Similarly, Trump's nominating speech measured poorly in the minds of American voters as compared to Clinton.

"Trump's speech was rated less positively than any Gallup has asked about since 1996," wrote Jeffrey M. Jones for Gallup. "The positive rating of Clinton's speech is slightly below the historical average of 47 [percentage points], but similar to Barack Obama's 2012 acceptance speech."

Gallup surveyed Americans after the GOP convention on July 23-24 and after the Democratic convention on July 29-30. The polling was conducted by telephone of approximately 1,000 respondents each, as part of the Gallup U.S. Daily survey that had a four percentage point margin of error.