Sentence:  Senator Dick Durbin has suggested that the <WSD>birthers</WSD> and the health care protesters are one and the same; we don't know how many of the protesters are <WSD>birthers</WSD>, but it wouldn't be surprising if it's a substantial fraction. 
Meaning of the word marked with <WSD> tags:  A believer in the conspiracy theory that (Barack Obama), 44th President of the United States (2009–2017), was not born in that country, and therefore ineligible for presidency due to national law.