Jeremy Roupp is a third-generation lumber man. Growing up in northwestern Lycoming County, his family owned a sawmill and logging business. …Over the decades, Roupp has seen the precipitous decline of the industry — from the impact of the housing and economic crisis of 2008, tough trade agreements, fickle consumer demand and, more recently, the inundation of cheap alternatives into the U.S. market. Now, however, retaliatory tariffs and the loss of export markets to global competitors are threatening the survival of the industry. If the Trump administration does nothing to alleviate the pressure on the industry, Roupp said, its future vitality is in question. Roupp is amplifying the concerns of an industry that overwhelmingly voted for the man who imposed the retaliatory tariffs: President Donald Trump. Recently, some 48 hardwood companies and industry organizations from Pennsylvania sent a letter to the Trump administration urging it to include the U.S. hardwood sector in tariff relief programs.