Hillary Clinton
Hillary ClintonReuters

U.S. Democratic presidential nominee Hillary Clinton on Thursday slammed her Republican rival Donald Trump for talking about things he learned in classified intelligence briefings and for praising Russia's Vladimir Putin as a better leader than President Barack Obama.

Speaking to reporters and quoted by Reuters, Clinton also criticized Trump for saying U.S. generals had been "reduced to rubble" by Obama's policies.

Trump’s comments came at the Commander-in-Chief forum, which aired on NBC and in which Clinton participated as well.

At the televised forum, Trump said he was "shocked" by information he got during the briefing. "What I did learn is that our leadership, Barack Obama, did not follow what our experts ... said to do," Trump said.

Clinton fired back on Thursday, saying Trump's comments on the briefing were "totally inappropriate and undisciplined."

"I would never comment on any aspect of an intelligence briefing I received," Clinton said before boarding her campaign plane, according to Reuters. As nominees for the November 8 presidential election, she and Trump are entitled to receive intelligence briefings.

Clinton also blasted Trump's praise of Putin as a better leader than Obama, saying was "not just unpatriotic and insulting to the people of our country, as well as to our commander in chief, it is scary."

"It suggests he will let Putin do whatever Putin wants to do and then make excuses for him," Clinton charged.

Trump later fired back at Clinton, saying her comments were an effort to make up for a poor performance during the security forum.

"Hillary Clinton is always complaining about what's wrong," he said during a campaign stop in Cleveland, according to Reuters.

"I just watched her on the tarmac. She tried to make up for her horrible performance last night," he added.

Clinton’s criticism of Trump was also echoed in an interview she gave to Israel’s Channel 2 News, in which she said that the Islamic State (ISIS) jihadist group is praying for Trump to win the election.

The former Secretary of State quoted Matt Olsen, the former chief of the National Counterterrorism Center, who had written in a TIME article, published Thursday, that “ISIS supports Donald Trump”.

“He quoted ISIS spokespeople rooting for Donald Trump’s victory, because Trump has made Islam and Muslims part of his campaign. And basically, Matt Olsen argues, the Jihadists see this as a great gift. They are saying, ‘Oh, please, Allah, make Trump president of America,” she charged.

“I’m not interested in giving aid and comfort to their aid and comfort to their evil ambitions,” added Clinton. “I want to defeat them, I want to end their reign of terror. I don’t want them to feel as though they can be getting more recruits because of our politics.”

Meanwhile, polls released on Thursday found that Clinton and Trump are neck-and-neck in four key swing states: Florida, Ohio, North Carolina, and Pennsylvania.