President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE on Friday threatened to "reciprocate" travel warnings issued against the U.S. following a pair of mass shootings.

Asked about his reactions to the travel advisories, Trump replied, "Well, I can't imagine that. But if they did that, we'd just reciprocate."

"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," he added.

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"Look, our country has been taken advantage of by foreign countries, even allies — including allies, and in many cases, more than anybody else," Trump said. "We've been taken advantage of for many, many years, and it stops. It stopped."

Uruguay, Venezuela and Japan issued warnings this week after the U.S. experienced a pair of mass shootings last weekend that killed 31 people. Japan warned of "the potential for gunfire incidents everywhere in the United States,” and described the country as a “gun society.”

Uruguay told its citizens to be aware of “growing indiscriminate violence, mostly for hate crimes."

Venezuela similarly warned of "the recent proliferation of violent acts and hate crimes.”