An American Indian tribal leader says the failure of a bill to create a tribal casino in northern Maine widens the rift between the tribes and state leaders. The bill died after the Republican-controlled Senate voted 18-16 against it Monday, although the House had approved the measure last week. The proposal would have allowed a casino designed to benefit the state’s four federally recognized tribes to be built in Washington or Aroostook counties. The failure of the casino project is disheartening for the four tribes, said Houlton Band of Maliseet Indians Tribal Chief Brenda Commander.