America's "exceptionalism" is just this--while most nations at most times have claimed their own history or culture to be exclusive, America's foundations are not our own--they belong equally to every person everywhere. The truth that all human beings are created equal in their natural rights is the most "inclusive" social truth ever discovered as a foundation for a free society. "All" means "all"! You can't get more "inclusive" than that!
That's not a helpful position to take if you want to maintain your own distinct national identity. It means that an American identity is so inclusive that it applies to everyone. Open borders follow as a logical consequence - and Paul Ryan has supported legislation that would make the US borders more porous:
Ryan has cosponsored five amnesties, including the misnamed Secure America and Orderly Immigration Act, which was identical to a bill introduced by Ted Kennedy and John McCain and would have granted amnesty to virtually every single illegal alien in the country and massively increased legal immigration.
In a book published last year on Ryan and two other Republicans (Young Guns: a New Generation of Conservative Leaders), Fred Barnes writes:
In short, Cantor, Ryan and McCarthy would like to fill the ranks of House Republicans with members, like themselves, committed to policies and legislation infused with the principles of limited government, free markets, and individual freedom. Young Guns is not for "me-too" Republicans, those comfortable with a scaled-down version of the Democratic agenda.
Limited government, free markets and individual freedom. That might be a better option than large, intrusive government, and it might express one part of an American tradition, but by itself it is not adequate as a conservative formula. How can the historic American nation conserve itself on such terms?
That formula is really an expression of a right-liberalism, i.e. a belief that a liberal society is best regulated by the free market rather than by a state bureaucracy.
If the Republicans are ever to be taken seriously as conservatives they need to extend their formula, to include a defence of a particular historic tradition and people.