At Wednesday's debate, Trump is expected to face tough questions about his foreign policy knowledge. Last week, his failure to answer tough security and international affairs queries posed by radio host Hugh Hewitt -- who will be challenging candidates at this week's debate -- highlighted his lack of foreign policy bona fides.
Unable to answer detailed questions about terrorist leaders, Trump said the questions themselves were flawed.
What Donald Trump is doing on the campaign trail
"Well, that is a gotcha question, though," he responded to Hewitt. "I mean, you know, when you’re asking me about who’s running this, this this, that’s not, that is not, I will be so good at the military, your head will spin."
Trump also sidestepped attempts to pressure him to lay out his military strategy, saying that "you don’t want to let people know what you’re going to do with respect to certain things that happen." In the past, he has called for more resources to be directed to the military.
Another issue where Trump has hit turbulence on his ascent to the top of the polls will also take center stage at Tuesday's event.
Trump, who did not serve in the military, faced criticism earlier this summer for appearing to speak dismissively about both the military record and the veterans issues record of Sen. John McCain (R-Ariz.), a naval aviator who was a prisoner of war during the Vietnam War.
VSA chairman Joel Arends defended Trump during that controversy, though he did not embrace the businessman's assessment of McCain's record.
Trump himself has said he'd address problems with the VA health care system by "firing everyone at the VA" and that the problems facing the system could be addressed by "getting Trump elected president."