U.S. Sens. Dianne Feinstein (D-Calif.), Patty Murray (D-Wash.) and 33 other senators called on U.S. Soccer to establish equal pay for its athletes. Despite their successes on the field, players on the U.S. Women’s National Team are still paid considerably less than their male counterparts.

In 2016, the Senate unanimously passed a resolution calling for U.S. Soccer to immediately eliminate gender pay inequity and treat all athletes with the same respect and dignity. Despite that resolution and other efforts, the pay gap has persisted, forcing 28 members of the women’s team to file a lawsuit earlier this month.

“While we recognize that the U.S. Women’s National Team and the U.S. Men’s National Team have different pay structures, the pay outcomes nevertheless demonstrate striking inequities,” the senators wrote. “For example, the U.S. Men’s National Team received nearly $5.4 million in total performance bonuses after losing in the Round of 16 of the 2014 World Cup, while the U.S. Women’s National Team received less than a third of that amount for winning the World Cup the following year. This type of pay disparity is difficult to justify, and in stark contrast to what the U.S. Senate unanimously urged in 2016.”

To read the full letter, visit feinstein.senate.gov.