In a plan released earlier this month, Trump called for an end to birthright citizenship for the children of undocumented immigrants and for the deportation of undocumented workers. He did not offer more specifics as to how undocumented workers would be removed from the country or how much the plan would cost.

“It’s called management,” he said. “I’m going to get great people that know what they are doing.”

When asked by ABC's George Stephanopoulos if he expected “neighbors to start turning in neighbors,” Trump replied, “I don't know what's going to happen.”

Trump also took shots at opponents for the Republican nomination, including former Florida Gov. Jeb Bush, who he called a “low energy person.”