US Election 2016: Clinton condemns Trump's plans for Nato
Democratic front-runner Hillary Clinton rebuked Republicans and defended Nato in a counter-terrorism speech after deadly attacks in Brussels.
Her comments contrasted sharply with her Republican counterparts, namely Donald Trump, who has suggested scaling back US commitments to Nato.
Mrs Clinton said the US should consult more deeply with Arab partners and stand with Europe in its time of need.
"Our European allies stood with us on 9/11. It's time to return the favour."
America should not turn its back on its allies, she said during remarks at Stanford University in California, and insulting them was not a good way to fight terrorism.
She addressed Mr Trump's calls to reinstate the use of torture and waterboarding to glean information from those accused of terrorism.
"I am proud to have been part of an administration that outlawed torture," the former secretary of state said.
The deadly attacks in Brussels that killed more than 30 people were the "latest brutal reminder" that more must be done to defeat so-called Islamic State (IS), she said.
The US and Europe should take a "harder look" at airport security protocols, and other "soft targets" that IS may attack.
Mrs Clinton also said a proposal in Congress to make a national commission on encryption could help fight online radicalisation.
Texas Senator Ted Cruz has suggested in the wake of the attacks that police patrol Muslim neighbourhoods to fight terrorism, and has also suggested "carpet-bombing" IS in Syria.
Mrs Clinton called his suggestion "wrong, counterproductive and dangerous," and that it would be similar to "treating American Muslims like criminals".
Mr Trump has said it is acceptable to kill terrorists' families and that the US should not admit any Muslims into its borders.
"If Mr Trump gets his way, it will be like Christmas in the Kremlin," she said of Mr Trump's foreign policy views.