TULSA, Oklahoma, April 30 -- GPA Midstream Association (formerly the Gas Processors Association) issued the following news: * * * GPA Midstream advocates for midstream interests in nation's capital By Stuart Saulters, GPA Midstream Vice President of Federal Affairs GPA Midstream visited the nation's capital last week to provide the midstream perspective to policymakers and connect with allied energy industry trade groups. What we're doing: A contingent from GPA Midstream met with senior lea  more