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WASHINGTON, DC - June 29: Aide Sophia Yan holds a chart steady in the breeze during a news conference by her boss, Sen. Jeff Merkley, D-Ore., on the West Front of the U.S. Capitol on legislation Merkley is sponsoring that is aimed at eliminating U.S. dependence on overseas oil by 2030. (Photo by Scott J. Ferrell/Congressional Quarterly)

WASHINGTON, DC - June 29: Aide Sophia Yan holds a chart steady in the breeze during a news conference by her boss, Sen. Jeff Merkley, D-Ore., on the West Front of the U.S. Capitol on legislation Merkley is sponsoring that is aimed at eliminating U.S. dependence on overseas oil by 2030. (Photo by Scott J. Ferrell/Congressional Quarterly)

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