Re: Clinton making a fool of Trump on foreign policy
Hillary Clinton: Donald Trump is 'dangerously incoherent'
In a foreign policy speech, Mrs Clinton said electing Mr Trump would be a "historic mistake" and his temperament made him unfit to be president.
She ran through Mr Trump's foreign policy points and refuted each one, calling him thin-skinned, irrational and unprepared.
Mrs Clinton is still fighting Bernie Sanders for the Democratic nomination.
The senator from Vermont has vowed to keep fighting for the nomination until the party's convention in July, despite Mrs Clinton's strong delegate lead.
Focusing her attacks on Mr Trump, Mrs Clinton said his vision for the country was all wrong and that he fundamentally did not understand America, which she called a "big-hearted, fair-minded country".
She discussed the importance of supporting allies like Israel and defended the Iran nuclear deal.
Someone like Mr Trump could not be in charge of the country's nuclear codes, she said, and his proposals were vague and often nonsensical.
"This isn't reality television, this is actual reality," she said.
She said his anti-Muslim rhetoric and talk of American isolationism bolstered the so-called Islamic State, and argued against his disdain for Mexico and Mexican immigrants coming into the country.
Questioning his relationship with Russian president Vladmir Putin, she said: "I'll leave it to a psychiatrist to explain his affection for tyrants."
Hillary Clinton: Donald Trump is 'dangerously incoherent'