On October 28, the Sierra Club, the Natural Resources Defense Council, and Friends of the Earth sent a letter to Harold W. Geisel, deputy inspector general for the State Department, requesting an investigation into whether TransCanada’s proposed Keystone XL crude oil pipeline review violated the National Environmental Policy Act (NEPA) because of biases within the department. The groups also warned the Obama administration that environmentalists would withhold votes and support in the 2012 election.