Democrats in Washington, D.C., are reportedly worried over Mayor Muriel Bowser‘s decision not to sign the council-passed city budget.

Bowser took issue with the city council’s final budget, which she argued, in a letter to council Chairman Phil Mendelson, would be “setting the stage for additional tax hikes for our residents and businesses next year,” and is an “unsustainable” approach, according to WJLA. Mendleson responded to Bowser’s decision by questioning if she wanted Congress to get involved in local affairs.