A leading progressive group has declared Democratic presidential candidates will have to prove their commitment to the Black Lives Matter movement to receive its endorsement.

After there was conflict between some Democratic White House hopefuls and activists concerned about police violence against black Americans at the Netroots Nation Conference, Democracy for America announced it would be adjusting its endorsement process.

"[R]eal solidarity means not just taking action in response to racial injustice and police brutality, but doing everything we can to connect the fight against structural racism and our country's culture of white supremacy to every aspect of the work we do," DFA executive director Charles Chamberlain wrote in a blog post.

Throughout the 2016 election cycle, the organization plans to ask local, congressional, and presidential candidates how they plan to support the Black Lives Matter movement and "confront structural racism and our culture of white supremacy." The new criteria will join a litany of progressive causes that Democratic candidates are quizzed on, including LGBT rights, immigration reform, Social Security expansion and debt-free college.

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