A PAC, or Political Action Committee, is an organization within the United States that raises funds privately to spend on political endeavors in an attempt to influence legislation or elections, especially at the federal level. Often, PAC funds are donated to the campaign of a politician running for a particular office. The American Dental Association has a political action committee, called the ADPAC. Many dentists, periodontists, orthodontists, and other dental professionals support PACs that help lobby for legislation to be passed that benefits their practice, their patients, and the overall profession. Dental professionals can contribute financially to PACs that lobby for initiatives that support them. ADPAC is one of the largest health PACs in the United States and has raised more than $1.2 million. Other smaller dental PACs may exist, however, they are unlikely to be as influential as the American Dental Association PAC.