WASHINGTON – President Donald Trump threatened undefined retaliation Friday against countries and organizations that issue travel warnings on the United States because of gun violence.

“If they did that, we’d just reciprocate,” Trump said during a wide-ranging impromptu gaggle with reporters at the White House, en route to fundraisers in New York.

He added: “We are a very reciprocal nation with me as the head. When somebody does something negative to us in terms of a country, we do it to them.”

Amnesty International and a growing list of countries have begun issuing warnings about travel to the United States because of gun violence, including mass shootings over the weekend in El Paso, Texas, and Dayton, Ohio.

Know the risks:Travel advisories by country

Warnings:Amnesty International issues warning about travel to US amid ‘high levels of gun violence’

Warnings, which are of varying degrees of intensity, have come from a list of countries that include Uruguay, Venezuela, Japan, Germany, […]