In other words, you the rap Franklin Roosevelt
Portfolio sick as polio corroded cells

from Soul Khan – Soulstice Lyrics on Rap Genius

Meaning

FDR was famously a victim of Polio and became wheelchair bound to the loss of motor function in his legs. Needless to say, Polio is a horribly debilitating disease that truly attacks nerve cells and corrodes them away. Soul equates this disease with his lyrical abilities (portfolio).

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