Architecture: 1850s-1890s. 1850s. James Buchanan, at the urging of his niece and White House hostess Harriet Lane, added a wooden greenhouse on the roof of the west terrace in 1857, adjacent to the State Dining Room. One could enter a private world of plants and flowers grown for decorating the house.
A caucus is a meeting of supporters or members of a specific political party or movement. The term originated in the United States, but has spread to Australia, Canada, New Zealand, South Africa, Brazil and Nepal.
Caucus meetings are arranged by either the state or political party to take place at a certain place and time. Caucuses are unique in that they allow participants to openly show support for candidates. Voting is often done by raising hands or breaking into groups according to the candidate participants support.