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An attack ad from a veterans group criticizes Donald Trump for not taking a stronger position against the Obama administration's nuclear agreement with Iran.

Michael Pregent, Iraq War veteran and executive director of Veterans Against the Deal, explained on "The Kelly File" that they created the ad because they didn't see any difference between Trump and Hillary Clinton's positions on Iran.

"As a deal-maker, Trump should know that the Iran deal should be torn up on day one, because Iran's already violating it," Pregent said.

"This is the Republican front-runner, and he needs to have a different position than Hillary Clinton, because right now, we don't see it."

Sgt. Robert Bartlett, an Iraq War veteran who was badly maimed by an Iranian-made roadside bomb, added that it's important for Trump to clearly state his policies and plans for Iran.

"Is he going to put those sanctions back on Iran and financially hurt them?" Bartlett asked. "He needs to be clear about what he's going to do and put that plan forward."

Former Navy SEAL and Trump supporter Carl Higbie said that Trump has made it clear that he's no fan of the Iran deal.

Higbie argued that it would be more helpful for the group to launch attack ads against Clinton. Regardless, he said, the ads won't hurt Trump in the long run.

"If you want to bring something on, bring it on," Higbie said. "Because it's only going to make us stronger."

Watch more above and tune in to the Fox News Republican presidential debate, live from Detroit, Thursday at 9:00pm ET!

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