President Obama may be planning to sock his fellow citizens with a global tax on carbon dioxide imposed via a United Nations agreement known as a "soft law," one that technically does not require or even solicit Senate approval. The pathway toward this Lilliputian tax -- in which small, poor nations seek to siphon off much of the wealth of the American people -- began when President George H. W. Bush signed off on Agenda 21 at the Rio Earth Summit in 1992. The assault on our liberties continues.