Really? This is from the FWS website:
What is the U.S. role in the illegal elephant ivory trade?
The United States is among the world’s largest consumers of wildlife, both legal and illegal. As with any black market trade, it is difficult to determine the exact market value or rank the U.S. role in comparison to other nations. However, we remain a significant ivory market, and we must continue to be vigilant in combating illegal ivory trade. By effectively controlling illegal ivory trade at home and assisting elephant range states and consumer countries around the world, we can have a significant impact on elephant conservation.
Our current laws and regulations focus on controlling import and export, while allowing some ivory trade within the United States. Ivory sold in the United States typically involves worked items such as carvings and components of larger finished products such as knife handles, billiard cues, and furniture. Ivory is sold in retail shops as well as through online sellers. Though there is trade in antiques and other legally acquired ivory imported prior to the 1989 AECA ivory import moratorium, we believe a substantial amount of elephant ivory is illegally imported and enters the domestic market. It is extremely difficult to differentiate legally acquired ivory from ivory derived from elephant poaching. Our criminal investigations and anti-smuggling efforts have clearly shown that legal ivory trade can serve as a cover for illegal trade. As just one example, Service and state officers seized more than two million dollars-worth of illegal elephant ivory from two New York City retail stores in 2012.