"Apparently Arnold was inspired by President Bush, who proved you can be a successful politician in this country even if English is your second language"

This quote by Conan O'Brien is a humorous jab at previous President George W. Bush. It suggests that Bush was not a particularly significant speaker, which his success as a political leader was due to his capability to conquer the language barrier. O'Brien is recommending that Arnold Schwarzenegger, who is also not a native English speaker, could be successful in politics if he follows Bush's example. This quote is an easy going way of satirizing Bush's lack of linguistic prowess, while likewise acknowledging his success as a political leader. It likewise implies that language barriers can be conquered, and that even those who are not native English speakers can be effective in politics.