WASHINGTON (Reuters) - Senate Democrats Thursday dismissed the Bush administration's plan for voluntary cuts in U.S. greenhouse gas emissions as "baloney" and said it will not help slow global warming. The White House plan depends on U.S. companies to voluntarily curb industrial emissions of carbon dioxide and links reduction targets to American economic growth. Democrats prefer a mandatory approach that dictates specific cuts. President Bush withdrew the United States last year from the international Kyoto treaty that aims to cut heat-trapping emissions, saying it was too costly to the economy. James Connaughton, chairman of the White House's Council on Environmental...