birther

[bur-ther]
noun Informal.
  1. a person who claims that the presidency of Barack Obama was unconstitutional, citing a belief that he was not born in the United States, or denying the authenticity of his birth certificate.

Origin of birther

First recorded in 2005–10; birth + -er1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Contemporary Examples of birther