Sen. Ted Cruz's (R-TX) presidential campaign responded Wednesday to renewed attention from birthers who believe the Texas Republican isn't eligible to run for commander-in-chief because he was born in Canada.

Conspiracy theory website WND, which has functioned as a sort of hub for birthers, recently pointed to Cruz as one of four Republican candidacies that self-styled "strict constitutionalists" oppose.

Cruz spokesman Rick Tyler dismissed the birther chatter in an email to TPM.

"Senator Cruz has not spent a single moment on this earth where he was not an America citizen, indeed a natural born American citizen because his mother was and is an American," Tyler wrote.

He also pointed to a Harvard Law Review article on the "natural born" citizen question written by a bipartisan pair of former solicitors general.

"Despite the happenstance of a birth across the border, there is no question that Senator Cruz has been a citizen from birth and is thus a 'natural born Citizen' within the meaning of the Constitution," the article read.