[post_page_title]Meghan has a different criterion[/post_page_title]
Even though the establishment has run like this for a very long time, Meghan wants things to be run differently, and more suited to her. One of the things she wants out of a potential nanny is for them to be American, not British.
Some people have suggested this is very narrow-minded, and choosing someone because of their nationality is a little bit below the belt. Kate and William have a Spanish nanny who has supported them for many years.