Definers Public Affairs is an American right leaning opposition research firm based in Arlington, Virginia. It performs media monitoring services, conducts research using the Freedom of Information Act and also creates strategic communication to negatively influence the public image about individuals, firms, candidates and organizations who oppose their clients. Definers shares at least nine current and former executives, as well as its office space, with America Rising, a Republican-affiliated political action committee, and NTK Network, a digital news aggregator. - Source: Wikipedia