While potentially taking years to litigate, the lawsuit is likely to have an immediate political impact in Hartford. It appears geared to raise doubts about the tribes’ ability to legally develop off-reservation casinos or compete for exclusive rights to sports betting in the state. But the Mashantucket Pequot and Mohegan tribal nations, the respective owners of Foxwoods Resort Casino and Mohegan Sun on reservations in eastern Connecticut, reaffirmed Monday that they will not give up plans for East Windsor in return for sports betting or any other inducement. Two days later, MGM is laying down its own marker, filing a suit that has been in making for months or longer. The suit asks a federal judge to vacate Interior’s approval of the amendments, alleging a violation of a federal Indian gaming law and the Administrative Procedure Act.