Singing Christmas Tree upon the location. Since then, the singing Christmas tree concept has spread to Canada, the Philippines, South Korea, Switzerland and Sri Lanka. The most attended tree takes place in Knoxville, Tennessee, with 60,000 attendees in 2007. The first Christmas trees came to the United States in the 1740s from Moravian (now part of the Czech Republic) settlers. In 1851, the first commercial tree lot in the United States was set up in New York City. President of the United States Franklin Pierce set up the first Christmas tree in the White House in 1856. Artificial trees were first developed in
Franklin Pierce and party unity", which he tried to place ahead of his personal views on political issues. As he would as president, Pierce valued Democratic Party unity highly, and saw the opposition to slavery as a threat to that. Democratic James K. Polk's dark horse victory in the 1844 presidential election was welcome news to Pierce, who had befriended the former Speaker of the House while both served in Congress. Pierce had campaigned heavily for Polk during the election, and in turn Polk appointed him as United States Attorney for New Hampshire. Polk's most prominent cause was the annexation of Texas,