You might associate the White House with Obama right now, since he’s the president and all, but it doesn’t matter whether you’re an Obama supporter or not (he actually joined Google+ last November), because this is about the institution itself. It means future presidents and their administrations will keep using it, too. So this is a big deal for Google+ because it makes it “official” that Google+ is a social network that is here to stay. If the Government institutions themselves start using Google+, then that can only be a good thing for Google+ because more people will hear about …