Democratic presidential hopeful Hillary Clinton has called Republican presumptive nominee Donald Trump “dangerously incoherent”.
Hillary Clinton said Donald Trump was unfit to be president and his election would be a “historic mistake”.
Donald Trump hit back, saying Hillary Clinton “no longer has credibility – too much failure in office”.
Outside Donald Trump’s rally in San Jose, California, anti-Trump protesters clashed with his supporters in one of the worst such confrontations so far.
Several of the billionaire’s supporters were punched, one was pelted with eggs and others were spat at, reports said.
Paul Ryan had previously refused to back Donald Trump and his support is the latest sign Republicans are unifying around their nominee.
He wrote in a column in his hometown Gazette newspaper in Wisconsin: “We have more common ground than disagreement.”
Paul Ryan also attacked Hillary Clinton saying: “A Clinton White House would mean four more years of liberal cronyism.”
In her speech Hillary Clinton, who is fighting Bernie Sanders for the Democratic nomination, rejected Donald Trump’s foreign policy points, and called him thin-skinned, irrational and unprepared.
Hillary Clinton defended the Iran nuclear deal and said a Trump presidency could start overseas wars and ruin the US economy.
“This isn’t reality television, this is actual reality,” she said.
Hillary Clinton also said someone like Donald Trump could not be in charge of the country’s nuclear codes and that his proposals were vague and often nonsensical.
She said his anti-Muslim rhetoric and talk of American isolationism bolstered ISIS and argued against his disdain for Mexico and Mexican immigrants coming into the country.
Questioning Donald Trump’s relationship with Russian President Vladimir Putin, Hillary Clinton said: “I’ll leave it to a psychiatrist to explain his affection for tyrants.”
Bernie Sanders has vowed to keep fighting for the nomination until the party’s convention in July, despite Hillary Clinton’s strong delegate lead.