Chairwoman Karen Diver, Star Tribune photo by Glen Stubbe

Karen Diver is resigning as chairwoman of the Fond du Lac Band of Lake Superior Chippewa to take a position in the Obama administration.

Diver, who has led the band since 2007, announced her resignation Monday and said she has accepted an appointment as special assistant to the president for Native American affairs.

"I am excited by the opportunity to have a wider impact in Indian County under President Obama's administration, which has shown unprecedented support for Indian County," she wrote in a letter posted on the band's website. "I will be forever grateful for the opportunity and faith you have given me to serve as the Chairwoman of the Fond du Lac Band of Lake Superior Chippewa."

Diver plans to resign Nov. 13. The Reservation Business Committee, she said, would be chaired in the interim by its vice chairman, Wally Dupuis.

You can read Diver's farewell letter here.