Donald Trump actually said...
This program grants visas not on a basis of merit but simply because applicants are randomly selected in an annual lottery. And the people put in that lottery are not that country's finest. We know that the program presents significant vulnerabilities to our national security. It's a very unsafe program for our country and we're not going allow it to happen.
Context
Trump calls on Congress to end the diversity immigrant visa program, stating it is unsafe and presents vulnerabilities to national security.
11/01/2017