Detroit (CNN) Hillary Clinton warned the roughly 6,000 people at an NAACP dinner in Detroit on Sunday that Donald Trump's candidacy is the biggest risk to President Barack Obama's legacy, putting the decision between her and the Republican front-runner in stark terms.

While Clinton routinely touts Obama and knocks Trump, her remarks to the National Association for the Advancement of Colored People chapter dinner is further than she has gone before, warning that the 2016 election is about "unity versus division, compassion versus selfishness and love versus hate."

"Now America's decision is who will succeed him," Clinton said of Obama before hitting Trump for questioning the President's birth certificate and initially failing to disavow white supremacists who are supporting his campaign.

"We can't let Barack Obama's legacy fall into Donald Trump's hands," Clinton said. "We can't let all the hard work and progress we've obtained over the last seven-and-a-half years be torn away."

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