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Draft Biden South Carolina state director Isaiah Nelson has officially joined the Martin O'Malley campaign as a senior adviser in the Palmetto State.

"In light of Vice President Biden's decision not to run, it is clear that there is only one candidate in this race who has delivered results from raising the minimum wage, signing marriage equality into law, abolishing the death penalty, investing in education, and passing some of the strictest gun control laws in the country," Nelson said in a statement Thursday morning.

He added, "I encourage others to join me in supporting Gov. O'Malley because we need someone who doesn't just hold progressive principles, but has proven he can deliver on them."

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