About one-third of U.S. Catholics approve of President Trump’s job performance, a percentage that has remained stable since the start of his presidency a little more than two years ago. But a new report from the Pew Research Center finds that the president is losing support from white Catholics—and gaining ground with non-white Catholics.

According to a report published on Monday, 36 percent of U.S. Catholics “approve of the way Donald Trump is handling his job as President,” the same percentage that was reported in February 2017, shortly after Mr. Trump took office.

When broken down by white and non-white Catholics, the numbers tell a different story.

The latest survey, conducted in January, found that 44 percent of white Catholics approve of Mr. Trump’s job performance.

Support for Mr. Trump among white Catholics has generally hovered around 50 percent since the early days of his presidency, according to Pew, with a high of 55 percent in April 2017 and again in May 2018 and a low of 36 percent in December 2017. Greg Smith, associate director of research at Pew Research Center, told America that support for Mr. Trump from white Catholics has been “pretty consistently within that band.”

The latest survey, conducted in January, found that 44 percent of white Catholics approve of Mr. Trump’s job performance.

Mr. Trump’s support among non-white Catholics is far lower compared to white Catholics.

The January survey found that 26 percent of non-white Catholics approve of the president’s job performance, up from 13 percent in February 2017.

In recent months, the president has boasted that his support from Hispanic Americans has been growing, crediting his continued efforts to build a wall along the U.S.-Mexico border. Experts have cast doubt on that claim, but they say that his support continues to hover around the 29 percent of the Hispanic vote that Mr. Trump won in the 2016 election.

According to Pew, the survey was conducted between Jan. 9-14, 2019, with a sample of 1,505 adults from all 50 states and Washington, D.C. The survey, which has a margin of error of three points, was conducted during a partial government shutdown that lasted more than a month, the longest in U.S. history. Following the shutdown, some of Mr. Trump’s base complained that he opened the government without securing funding for his proposed border wall. The survey also took place before the State of the Union, on Feb. 5, a speech that drew praise from some of the president’s strongest pro-life supporters.

Mr. Smith said the “most striking” finding in the January survey was that Christians who attend religious services more often support Mr. Trump at higher rates than those who attend less frequently.

Catholics who attend Mass weekly, a group that tends to oppose abortion and same-sex marriage at higher rates than Catholics overall, are about split when it comes to support for the president.

Fifty-two percent of Catholics who attend Mass weekly approve of the president’s job performance, down eight points from a high of 60 percent in the first half of 2017.

“What you see reflected in these evaluations of Trump is partisanship.”

Among Catholics who attend church “less often,” 45 percent approve of the president’s job performance, down from 48 percent two years ago.

While Catholics appear split, white Evangelicals continue overwhelmingly to approve of the president—even if his standing has taken something of a hit.

According to the report, 69 percent of white Evangelicals approve of the president, down nine points from February 2017.

Black Protestants consistently give the president the lowest marks among Christian groups, with approval hovering around 12 percent in June 2018. Support among white mainline Protestants has also remained more or less stable during the past two years, with 48 percent approving of the president in this report compared to 49 percent in 2017.

Mr. Smith said that beyond individual data points, trends show that all religious groups, like society in general, have become more partisan.

“What you see reflected in these evaluations of Trump is partisanship,” he said.

Michael J. O’Loughlin is national correspondent at America and author of Hidden Mercy: AIDS, Catholics, and the Untold Stories of Compassion in the Face of Fear.