That's what I said, Marco Rubio is a naturalized citizen, not a "natural born" citizen, and he became a naturalized citizen when his parents became naturalized citizen. He personally did not have to go through any process to obtain citizenship. That was granted when his parents were naturalized.
Sorry, but you did not understand the item that was incorrect. The incorrect statement was “he became a naturalized citizen when his parents became naturalized citizen.” It is incorrect because Marco Rubio was born and naturalized at birth on 27 May 1971, whereas his parents were naturalized years later in 1975. In other words, Marco Rubio was naturalized years before his parents and not “when his parents became naturalized.”