WASHINGTON, June 18 (UPI) -- Project Safe Neighborhood, which was created by President George W. Bush and Attorney General John Ashcroft and promises tougher federal enforcement of existing state firearm laws, violates the U.S. Constitution and can lead to serious miscarriages of justice, according to a policy analyst and attorney with an influential Washington think tank. Analysts at some think tanks agree with the conclusions of the study, "There Goes the Neighborhood," released by the libertarian Cato Institute. Others say the arguments of Gene Healy, the report's author, are unfounded and based on a narrow political agenda. No one, however,...