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Donald Trump offered renewed support tonight for the use of torture while repeatedly comparing a proposed free trade agreement to rape.

Donald Trump. Photograph: Patrick Semansky/AP

Trump, who has often praised the use of waterboarding as well as speaking positively about alleged war crimes committed by American troops, said at a campaign rally, “We have to fight fire with fire”, after referencing the penchant for beheadings by Isis.

The presumptive Republican nominee claimed that while the terrorist group committed a range of atrocities including beheading and drowning prisoners, the United States was afraid to even use waterboarding. In Trump’s opinion, this left Isis believing that the US was weak and stupid and it needs to “fight so viciously and violently” to combat the threat.

Trump also renewed his praise of waterboarding, which was banned by the Bush administration in 2006 as both potentially illegal and ineffective. “What do you think about waterboarding?” Trump asked the crowd. They cheered as he gave his answer, “I like it a lot. I don’t think it’s tough enough.”