Washington( CNN) Controversial former Sheriff Joe Arpaio on Wednesday called former President Barack Obama’s birth certificate a “phony document” in an interview on CNN.

“No doubt about it, we have the evidence presented, I’m not going to go into all the details, yeah, it’s a phony document, ” Arpaio said on “Cuomo Primetime.”

Arpaio announced Tuesday that he is running for the Arizona US Senate seat currently resided by Sen. Jeff Flake, who is retiring from Congress at the end of his term.