(AP)–A Native American tribe in northern Wisconsin is asking a federal judge to block another tribe from expanding a competing casino. The Stockbridge-Munsee Band of Mohicans filed a federal lawsuit Wednesday in Madison. It alleges the Ho-Chunk Nation’s plan to expand its Shawano County casino violates the Ho-Chunk’s gambling compact with the state. The lawsuit also alleges Gov. Scott Walker violated the Stockbridge-Munsee’s compact by not halting the Ho-Chunk expansion. The Stockbridge-Munsee fear the Ho-Chunk expansion will result in the loss of millions of dollars of revenue from their own Shawano County casino. State officials have said a 2003 amendment to the Ho-Chunk’s compact cleared the way for the expansion. Construction has already begun on the casino expansion. Officials in Walker’s administration and a Ho-Chunk spokesman didn’t immediately return messages.