"I'm not interested in giving aid and comfort to their evil ambitions", Clinton said.
Republican presidential nominee Donald Trump on Friday praised Matt Lauer's interviewing skills during an appearance before the Values Voter Summit in Washington, DC.
"I just watched her on the tarmac".
"I'm in their corner if they ever need to call me", she said.
"I've been so much more troubled in this campaign by what he has said about women broadly, about Americans with disabilities, about our veterans, about Americans who don't kind of share his straight white male heritage", Chelsea Clinton said after she was asked whether Trump's question about whether her mother "looked presidential".
The intensifying political combat came as Clinton's lead in opinion polls has slipped in recent days. The current average of polls from website RealClearPolitics puts her at 45.6 percent support, compared with Trump's 42.8 percent.
At a forum hosted by NBC earlier this week, Trump said Putin "has been a leader, far more than our president has been a leader", although he added that he doesn't "like" Russia's "very different system".
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Trump also sought on Friday to blame Clinton after reports that North Korea had tested a nuclear weapon, arguing it was the fourth such test since the Democrat became secretary of state in 2009 and that she should have ended the nation's nuclear program before her tenure ended.
The forum offered a prelude to how Clinton and Trump will deal with questions of national security in their three upcoming presidential debates later in September and in October.
Some of Trump's foreign policy positions, such as his proposal to fight terrorism by imposing a temporary ban on Muslims entering the country, have alarmed not just Democrats but many in his own party's leadership.
Clinton's comments on Trump were in response to a question asking whether, if elected, she will use the phrase "war on radical Islam", unlike the Obama administration.
Clinton was scheduled on Friday to meet with former senior national security officials in NY.
In his article titled "Why ISIS supports Donald Trump", published in TIME this week, Olsen wrote about Islamic State's "propaganda machine", as jihadists turn to social media to "advocate for Trump".
