Mark Pryor, Others Join Legislation for Keystone Pipeline Approval by Lance Turner Posted 3/14/2013 03:28 pm Updated 2 years ago U.S. Sen. Mark Pryor, D-Ark., joins a bipartisan group of lawmakers supporting legislation he says would give Congress the authority to approve the Keystone XL pipeline. Want the Full Article? Get Unlimited Archive Access for $19.95 per Year Readers must pay to access stories older than 20 days. Purchase Now Already have archive access? Login to view this article.