Trump’s tweet said, “If Elizabeth Warren, often referred to by me as Pocahontas, did this commercial from Bighorn or Wounded Knee instead of her kitchen, with her husband dressed in full Indian garb, it would have been a smash!”

The tweet sparked bipartisan criticism, including from Republican Sen. Mike Rounds of South Dakota, who at the time tweeted, “The Wounded Knee Massacre was one of the darkest moments in our history. It should never be used as a punchline.”

Angered by the Trump tweet and inspired by the criticism of it, a South Dakota nonprofit called Four Directions — which typically works to support Native American voting rights — mobilized an effort to rescind the Wounded Knee medals. That effort culminated in the introduction of legislation Tuesday, on the 143rd anniversary of the Battle of Little Bighorn.

The legislation, if passed by Congress and signed by the president, would require the names of the 20 medal winners to be removed from the government’s official Medal of Honor Roll.

For practical reasons, the bill would not require the medals to be physically returned. A spokesperson for Heck said some of the medals might be lost or buried with a soldier.