Donald Trump is in favor of the U.S. completely closing its borders in the wake of the deadly Brussels' airport attacks that left at least 34 dead and more than 200 injured.

"I would close up our borders," the 2016 Republican front-runner recently told Fox News. "We are taking in people without real documentation. We don't know where they're from or who they are."

Such fiery rhetoric hardly comes as foreign territory for Trump. Just last year he called for a temporary ban on all Muslims entering the U.S. following a similar terrorist attack in Paris. He has also vowed that if he is elected he will re-institute such tactics as water-boarding in interrogating suspected terrorists.

Trump Wants to Bring Back Waterboarding

"I would use water-boarding," Trump said on ABC's "Good Morning America." "And I would try to expand the laws to go beyond water-boarding."

Later, Trump also called for authorities to be allowed to conduct greater surveillance of mosques in the U.S.

"You need surveillance," he said. "You have to deal with the mosques, whether we like it or not. These attacks ... they're not done by Swedish people, that I can tell you."

Democratic presidential front-runner Hillary Clinton was quick to find fault with much of Trump's logic and vowed approach to things.

"Torture's not effective," she said of his call for the return of water-boarding. "That's like an open recruitment poster for terrorists."

As for all his closing the borders suggestions, the former Secretary of State added, "That shows a lack of understanding for how our system does work."

President Obama Share His Thoughts

Speaking in Havana on Tuesday, President Barack Obama also weighed in on all the recent carnage and what he sees as an appropriate course of action.

"The thoughts and prayers of the American people are with the people of Belgium," he said. "We stand in solidarity with them in condemning these outrageous attacks against innocent people. We will do whatever is necessary to support our friend and ally Belgium in bringing to justice those who are responsible. This is yet another reminder that the world must unite."

Meanwhile, Trump was at least partly joined in his call for sealing the border by GOP challenger and Texas Sen. Ted Cruz.

"We need to immediately halt the flow of refugees from countries with a significant al Qaida or ISIS presence, Cruz wrote in a lengthy Facebook post that also called for law enforcement being allowed to "secure and patrol" Muslim neighborhoods.

In a previous sweeping indictment, Trump charged Brussels residents had "coddled and taken care of" Paris terror suspect Salah Abdeslam prior to his arrest.

"When they see trouble they have to report it," he told talk show host Piers Morgan. "They are not reporting it. They are absolutely not reporting it and that is a big problem."

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