Trump Reverses Pledge To Mandate U.S. Steel For Keystone Pipeline. A Direct Beneficiary Is A Russian Oligarch With Close Ties To Vladimir Putin | HuffPost Posted on March 14, 2018 by John Oliver Mason via Trump Reverses Pledge To Mandate U.S. Steel For Keystone Pipeline. A Direct Beneficiary Is A Russian Oligarch With Close Ties To Vladimir Putin | HuffPost Share this:TwitterFacebookTumblrLinkedInMorePrintEmailPinterestLike this:Like Loading...