Tuberville is so far alone among Senate Republicans in regard to Trump's latest remarks about immigrants. Sen. Thom Tillis (R-NC) told The Hill that the former president's rhetoric was "unhelpful." Sen. Shelley Moore Capito (R-WV) said she "can't explain" Trump's comments, adding that "we're all children of immigrants."

Sen. Susan Collins (R-ME) went further, calling the ex-president's remarks "deplorable." She added his comments "have no place particularly from a former president." And Senate Minority Leader Mitch McConnell (R-KY) implied that Trump is a hypocrite, saying "it strikes me that didn’t bother him when he appointed Elaine Chao Secretary of Transportation," referring to his wife, who is a Chinese-American immigrant.

The former president's comments about immigrants are almost a verbatim quote from Hitler's manifesto, Mein Kampf. On Monday night, CNN's Kaitlan Collins pointed out that in the book, the architect of the Holocaust wrote that Jewish population "poisons the blood of others."

"Trump has used that line before and other phrases like it that echo Nazi rhetoric," Collins said. "But it should be noted that as you can see there, he is reading off a teleprompter, meaning that he knew exactly what he wanted to say."