"The U.S. cannot treat Colombian migrants as criminals," Petro wrote.
Petro said even though there were 15,660 Americans without legal immigration status in Colombia, he would never carry out a raid to return handcuffed Americans to the United States.
"We are the opposite of the Nazis," he wrote, in a jab at Trump.
Mexico also refused a request last week to let a U.S. military aircraft land with migrants.
I wish the lunatics voters that support this would realize how expensive each of these flights are, at tax payers expense! Easily $30k per flight and Trump is aiming for thousands of these flights!