Tennessee Senator Fears $20 Harriet Tubman Bill Diminishes Andrew Jackson Sen. Lamar Alexander not happy about his being displaced by Harriet Tubman.

 -- Sen. Lamar Alexander, R-Tenn., isn't happy that a Tennessee native, former President Andrew Jackson, is being displaced on the front of the $20 bill.

U.S. Treasury Secretary Jack Lew announced Wednesday that freed-slave and abolitionist Harriet Tubman will replace Jackson on the front of the $20 bill.

Jackson, the seventh U.S. president who was a slave owner and general considered one of America's first populist leaders, will now appear on the back of the note.

“United States history is not Andrew Jackson versus Harriet Tubman. It is Andrew Jackson and Harriet Tubman, both heroes of a nation’s work in progress toward great goals," Alexander said in a statement Wednesday.

"It is unnecessary to diminish Jackson in order to honor Tubman. Jackson was the first common man to be elected president. He fought to save the Union. He defined an American era. He helped found the Democratic Party. And he was a great Tennessean."

Lew also announced that Alexander Hamilton, the first U.S. Treasury secretary, will remain on the front of the $10 bill. A series of suffrage leaders will appear on the back of the $10 bill.

The design of the new notes will be revealed in 2020. Officials say it's too soon to know when they will enter circulation.