“I like Ben, but he cannot do with trade like I do,” Trump said. “He can’t do with a lot of things like I do, so we’ll just have to see what happens.”…

“He’s very, very weak on immigration and I’m very strong on immigration,” Trump said. “Ben Carson is very, very weak on immigration. He believes in amnesty strongly. He believes in citizenship. He’s going to give citizenship to people who are here illegally — you can’t do that.”

Carson supports giving undocumented immigrants guest worker status if they come forward and report their presence in the country.

He has repeatedly denied the characterization of his plan as amnesty, but has left the door open to those guest workers eventually becoming citizens.