OTTAWA- The Metis Nation, Saskatchewan is pulling its support for a federal bill that proposes to enshrine its self-government over concerns about the other two groups it recognizes. President Glen McCallum says the legislation is holding the group back, and its members made the decision to pull support after a meeting earlier today. Leaders of Metis organizations in Alberta and Ontario have defended the legislation, saying it would rightfully give them control over child welfare and other internal matters. But First Nations chiefs in Ontario have accused the federal government of overstepping its jurisdiction and alleged the legislation steps on their rights. The Manitoba Metis Federation has also opposed the extension of self-government to the Metis Nation of Ontario, saying its membership is not up to par with its definition…