GOP presidential candidate Carly Fiorina said on Sunday that her rival Donald TrumpDonald John TrumpTrump rips Dems' demands, impeachment talk: 'Witch Hunt continues!' Nevada Senate passes bill that would give Electoral College votes to winner of national popular vote The Hill's Morning Report - Pelosi remains firm despite new impeachment push MORE should closely study foreign policy if he wants the White House next year.

“I think it’s very difficult to lead if you don’t have the requisite knowledge,” she told host John Dickerson on CBS’s “Face the Nation.”

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“I do think it’s important to know who our enemies are,” Fiorina added.  “I think it’s important to know the difference between Hamas and Hezbollah and to know as well that both of them, for example, are proxies of Iran.”

Fiorina’s remarks follow Trump’s tense encounter with radio host Hugh Hewitt last week.

Trump accused the broadcaster of asking “gotcha” questions and intending on embarrassing him during the exchange last Thursday evening.

Fiorina argued on Sunday that she understands Trump’s struggles, even if she has concerns with his credibility on international relations.

“I think it’s perfectly acceptable that you don’t know the name of every terrorist leader,” the former Hewlett-Packard CEO said.  “I don’t always either.”

“I do think we’ve come to a place, though, where people realize that running for political office all your life isn’t necessarily the most qualifying set of experiences,” Fiorina said.

“We have a professional, political class that is either unwilling or unable to challenge the status quo of Washington and get anything done,” she added.  “And we have festering problems in Washington.”

Fiorina then refused comment on Trump’s fitness for the Oval Office versus her own.

“Well, that’s not a question for me,” she told Dickerson.  “That’s a question fro the voters of this country.”

“I am most definitely fit to be commander in chief and that’s why I’m running for that office,” Fiorina added.