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.
Difference Between Caucus and Primary. The caucus and the primary are two methods that the major political parties use to choose presidential candidates in the United States. Political parties often have a number of people who are qualified to run for a given election, and the parties must decide which candidate they want to back.