William Ruckelshaus

William Ruckelshaus, Who Defied Nixon During Watergate Crisis, Dies At 87

He was the first EPA administrator and later served a second stint at the agency, where he was hailed as "Mr. Clean." He resigned as Nixon's deputy attorney general.
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EPA Chief Under Nixon And Reagan: GOP’s Climate Denial Is 'Killing Everything'

William Ruckelshaus, the first and fifth EPA administrator, has been a fierce critic of Scott Pruitt.
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