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.
Party Caucuses in the U.S. Congress and State Legislatures. When used in relation to the U.S. Congress (including the House of Representatives and the Senate) and state legislatures, the word caucus can refer to the voting members of either of the two major political parties (the Democrats and the Republicans).