Trump has stepped us his attacks on four liberal Democrats in Congress, all women of color who have criticized his policies, calling on them to apologize as he himself faced charges of racism.
The Republican president's incendiary comments dovetail with the anti-immigrant stance he has embraced since his 2016 campaign for the White House, which included saying Mexico was sending rapists into the country and seeking to ban people from Muslim-majority nations.
Trump ignited controversy last weekend when he tweeted that the Democratic congresswomen should "go back" to where they came from if they do not like the United States.
Three of the lawmakers - U.S. Representatives Alexandria Ocasio-Cortez of New York, Ayanna Pressley of Massachusetts, and Rashida Tlaib of Michigan - were born in the United States.
Representative Ilhan Omar of Minnesota came as a refugee from Somalia and is a naturalized citizen.