Tillerson has recused himself from Keystone pipeline issues

U.S. Secretary of State Rex Tillerson stands during a meeting with Ukrainian Foreign Minister Pavlo Klimkin at the State Department in Washington, U.S., March 7, 2017. REUTERS/Joshua Roberts

WASHINGTON (Reuters) - U.S. Secretary of State Rex Tillerson has recused himself from issues related to TransCanada Corp's application for a presidential permit for the proposed Keystone XL pipeline, the State Department said in a letter to the environmental group Greenpeace. (Reporting by Eric Beech)