Washington, July 7 (RHC)-- U.S. President Donald Trump's approval rating has surged to the highest level of his presidency, according to a new Washington Post-ABC News poll.

The survey, which was released Sunday, found that 47 percent of registered voters approve of the job Trump is doing in the White House, a figure that represents a 5-point increase from April.  Fifty percent of registered voters disapprove of Trump's performance as president.

Meanwhile, 44 percent of voting-age Americans said they approve of Trump's job performance, while 53 percent said they disapprove of it.  Just 39 percent of voting-age Americans said they approved of Trump's job performance in April.

The survey's release comes as the 2020 Democratic primary race begins to heat up, as candidates such as Sen. Kamala Harris (D-Calif.) and Sen. Elizabeth Warren (D-Mass.) gain ground on former Vice President Joe Biden in the polls.   The economy served as the only issue where a majority said they approve of Trump's performance, according to the poll. Fifty-one percent of respondents said they approved of the way he has handled economic issues since entering the White House. Forty-two percent said they disapprove of his handling of the economy.

Meanwhile, a majority of respondents said they disapprove of how Trump has handled immigration, health care, issues of special concern to women, abortion, climate change, gun violence and foreign policy. Forty-nine percent said they disapprove of the way he's handled taxes, while 42 percent said they approve.   In addition, 65 percent of respondents said Trump has acted in an "unpresidential" way since taking office. Twenty-eight percent said he has acted in a "fitting and proper" way.

The Washington-Post ABC News poll was conducted between June 28 and July 1 among a national population of 1,008 adults. The margin of error for the full sample is 3.5 percentage points.  The margin of error is 4 percentage points for the sample of 875 registered voters.