started, of course, with the woman who set the stage for everyone, with martha washington taking us all the way through ida mckinleyole of first lady change? >> we have to look at how it remains the same. and that was the woman as the hostess for her husband and for the nation. i think the role grew to encompass imagining the white house, preserving the white house, sort of crafting an image for her husband's administration, and i see a groiing recognition of the position of the united states in world affairs. so that by the time you get to harrison, you have somebody who's looking to revamp the white house in a major way to make it a residence that is worthy of the chief executive of a major power. >> what would you ask? >> the free very distinct individuals who each followed this office was divided to find a way to shape it. but the biggest difference between the -- i would say the 19th century and the 20th century is that those opinions -- they were -- they were the stuff of compensation the next day. and that, in turn, is in some ways reflects the enormous impact. they're the biggest group, i think, the 20th ce