Republican presidential candidate Donald TrumpDonald John TrumpAssange meets U.S. congressman, vows to prove Russia did not leak him documents A history lesson on the Confederacy for President Trump GOP senator: Trump hasn't 'changed much' since campaign MORE said on Sunday that if he wins the South Carolina primary, it means Republicans are likely rejecting the war in Iraq, not former President George W. Bush.

On NBC's "Meet the Press," Chuck Todd said Bush is a very popular in South Carolina and asked if Trump's criticism of the former president will be "the game change-moment" people point to if he loses.

Trump pointed to the war in Iraq and said the people in South Carolina are "smart people."

"I think they're rejecting the war in Iraq. The war in Iraq is a disaster," he said. "I have a great relationship with South Carolina and the people."

"They're very smart people. They understand that the war in Iraq is a disaster and was a disaster. It totally destabilized the Middle East," he said.

He also disputed the claim that he called Bush a liar.

"I didn't call anyone a liar," he said. "I saw maybe there were lies because look, here were weapons of mass destruction. They said they existed and they didn't exist. Now it was his group that said it, there were weapons of mass destruction."

"That's why so many people got hood wigged into going into Iraq. Then they go in there, they searched high and dry, they looked all over, there were no weapons of mass destruction."