Treasury Secretary Steven Mnuchin | WABE 90.1 FM

Treasury Secretary Steven Mnuchin

Library of Congress / Associated Press

Treasury Secretary Steven Mnuchin is raising speculation that Harriet Tubman's future on the $20 bill could be in jeopardy.

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In a CNBC interview, Mnuchin on Thursday avoided a direct answer when asked whether he supported the decision made by the Obama administration to replace Andrew Jackson on the $20 bill with Tubman, the 19th century African-American abolitionist who was a leader in the Underground Railroad.