To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Share Embed Share URL Video File Node URL Embed Code <iframe title="MRC TV video player" width="640" height="360" src="https://www.mrctv.org/embed/135013" allowfullscreen></iframe> In an interview on CBS's "Face the Nation" on Sunday, GOP presidential candidate Sen. Marco Rubio (R-Fla.) said he believes sexual preference is not a choice for most people but that gay marriage is not a constitutional right.