Is the White House big enough for a family of mice . . . and a C-A-T? If you are a mouse, then you might know about Ava and Dean Squeakerton. They are kind of famous, for mice. That's because Ava and Dean and the rest of their family live in the White House. For years, Ava and Dean have roamed the tunnels below the West Wing without fear. But now there's a new pet in town, one that rhymes with hat and rat and whose name is spelled C-A-T. In the history...