TRUMP: Berlin Christmas market slaughter an 'attack on humanity'
Trump had previously issued a statement on the Monday truck attack, which killed 12 people and injured dozens. ISIS claimed responsibility.
When a reporter asked Trump about his previously stated plans to ban Muslim immigration into the US, he seemed to reinforce that it was an option on the table.
"You've known my plans all along and it's, I think we're going to be right, 100% correct," Trump said. "What's happening is disgraceful."
Trump was asked about his statement on the attack, in which he said that "ISIS and other Islamist terrorists continually slaughter Christians in their communities."
"That's an attack on humanity," Trump said. "That's what it is. It's an attack on humanity and it's got to be stopped."