Story highlights Rep. Steve King wants to bar the Treasury from spending any funds to redesign paper money or coin currency

The Treasury Department plans to switch out Andrew Jackson for Harriet Tubman on the $20 bill

Washington (CNN) An Iowa congressman this week proposed legislation that would have blocked Harriet Tubman from replacing President Andrew Jackson on the $20 bill, but it won't get a vote after a committee determined it wasn't in compliance with House rules.

Republican Rep. Steve King introduced an amendment to bar the Treasury Department from spending any funds to redesign paper money or coin currency.

The amendment would have nullified the Treasury Department's plans to replace the current image of Jackson on the $20 bill with a portrait of Tubman, one of the most prominent abolitionists for her work in the Underground Railroad during the Civil War. She will become the first black woman ever to appear on a U.S. banknote.

Speaking to CNN at the Capitol on Wednesday, King said Tubman's accomplishments didn't measure up to the seventh president.

"As much as she did, she didn't change the course of history," King said.

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