Former Secretary of State Hillary Clinton Hillary Diane Rodham ClintonWhat Senate Republicans have said about election-year Supreme Court vacancies Bipartisan praise pours in after Ginsburg's death Trump carries on with rally, unaware of Ginsburg's death MORE called a racism-motivated incident in Portland on Saturday "heartbreaking."

Clinton tweeted her condolences after two men were stabbed to death by a white supremacist in Portland, Oregon, when they tried to stop the man's racist tirade.

"Heartbreaking. No one should have to endure this racist abuse," the 2016 Democratic presidential nominee tweeted Saturday night. "No one should have to give their life to stop it."

Heartbreaking.

No one should have to endure this racist abuse.

No one should have to give their life to stop it.https://t.co/CpmQcHI8gi — Hillary Clinton (@HillaryClinton) May 27, 2017

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Police arrested 35-year-old Jeremy Joseph Christian early Saturday morning after he allegedly stabbed three men who tried to stop him from berating two Muslim women on a Portland MAX train. Two of the men died, while a third received injuries that were not life-threatening.

"In the midst of his ranting and raving, some people approached him and appeared to try to intervene with his behavior and some of the people that he was yelling at," Portland police spokesman Sgt. Pete Simpson said. "They were attacked viciously."

The Muslim holy month of Ramadan began on Friday at sundown.