Hillary Clinton dismissed Donald Trump Thursday as an "unqualified loose cannon" who is "within reach of the most important job of the world" after he secured the delegates necessary to win the Republican presidential nomination.
"I know that Donald Trump says outrageous things all the time, but today he officially clinched the Republican nomination," the Democratic front-runner told
Wolf Blitzer on CNN in a telephone interview. "So, this is now as real as it gets."
She said she agreed with President Barack Obama's comments at the G7 summit in Japan Thursday that Trump's comments have "rattled" world leaders.
"Of course, they are rattled," Clinton said. "He's talking about breaking up our alliances, letting countries get more nuclear weapons, banning all Muslims from coming to America.
"That is a recipe for fewer friends and more enemies and will make us less safe," she added. "This is not a reality show. It's not just politics. It's really serious.
"The entire world looks to the president for leadership — and that's what I would provide if elected."
Clinton said she doesn't think a debate between Trump and her Democratic challenger, Sen. Bernie Sanders, to raise money for women's health issues is "going to happen."
"This doesn't sound like a serious discussion," she told Blitzer. "I'm looking forward to debating Donald Trump in the general election. I really can't wait to get on the stage with him."
Turning to Wednesday's inspector general report on her private email use, Clinton reiterated her longstanding position that she believed that State Department policies allowed the practice.
"This report makes clear that personal e-mail use was the practice under other secretaries of state and the rules were not clarified until after I had left.
"As I've said many times, it was a mistake — and if I could go back, I would have done it differently," Clinton said.
The former first lady said she did not agree to be interviewed for by the inspector general because "I had already said everything I could on this matter."
Clinton noted her 11-hour testimony before the special House Benghazi committee last October, along with "numerous interviews" and calling on the State Department to release all of her emails.
"I have posted extensive information on my e-mail practice on my campaign's website," she said. "Everything I had to say was out there."