Franklin Graham, the Evangelical leader and CEO of Samaritan's Purse who prayed at Trump's inauguration, also disavowed the policy.
Last week he described the policy as "disgraceful," and added that it was "terrible to see families ripped apart and I don't support that one bit." However, he blamed "politicians for the last 20, 30 years" rather than Trump explicitly.
Daniel DiNardo, president of the US Conference of Catholic Bishops, also said: "While protecting our borders is important, we can and must do better as a government, and as a society, to find other ways to ensure that safety. Separating babies from their mothers is not the answer and is immoral."
Aside from winning four out if five evangelical voters in 2016, Trump also won white Catholics with a 23-point margin, of 60% to 37%.
The White House, however, has claimed that it was "very biblical to enforce the law."