WASHINGTON -- Less than two weeks before Donald Trump's inauguration as the nation's 45th president, majorities of Americans disapproved of his performance since winning the election and were are concerned about conflicts with his business empire.

Trump had a job disapproval rating of 51 percent among registered voters in a Quinnipiac University poll, with 37 percent approving.

In a Pew Research Center survey, 55 percent of U.S. adults disapproved of Trump's performance in explaining his policies and plans, while 39 percent approved.

The Pew survey also said 57 percent of American adults were concerned that Trump would face conflicts between his businesses and his ability to serve the country's best interests, while 42 percent said he would not. In December, 65 percent were concerned and 34 percent were not.

By 72 percent to 22 percent in the Quinnipiac poll, voters said they wanted a review of Trump's finances to find potential conflicts of interest.

In the Quinnipiac poll, 45 percent said Trump's election made them feel less safe, while 27 percent said they felt more safe and the same percentage said they felt just as safe.

Here's how voters rated Trump on several other attributes.

By 64 percent to 32 percent, Quinnipiac respondents said Trump should close his Twitter account. The president-elect recently attacked actress Meryl Streep via Twitter in response to her criticism of Trump at the Golden Globes Awards.

"One hundred and 40 characters may not be enough to tell Donald Trump just how much Americans want him to knock off the tweeting," said Tim Malloy, assistant director of the Quinnipiac poll. "While the president-elect argues his missives inform, many say stow the phone."

The Quinnipiac University of 899 voters was conducted Jan. 5-9 and had a margin of error of 3.3 percentage points. The Pew survey of 1,502 adults was conducted Jan. 4-9 and had a margin of error of 2.9 percentage points.

Jonathan D. Salant may be reached at jsalant@njadvancemedia.com. Follow him on Twitter @JDSalant. Find NJ.com Politics on Facebook