One of the mysteries of the English language finally explained.
Originally: a student intern working on the public advocacy campaigns pursued by Nader; an activist or researcher affiliated with campaigns resembling Nader's. Later in extended use: a political supporter of Ralph Nader.
1960s; earliest use found in Capital Times. From the genitive of the name of Ralph Nader + raider.
Nader's raider/neɪdəz ˈreɪdə/
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