Global Post – Americans spent $2.6 billion on gambling websites in 2012, according to a study released Tuesday by the casino industry as it renewed a push for Congress to regulate online betting. The American Gaming Association, which released the study, said it highlights the need for federal legislation to end the state of “ambiguity” on Internet wagering. The study by the British-based research firm H2 Gambling Capital found Americans accounted for a significant share of the $33 billion worldwide online gambling market, despite the legal limbo of most Internet betting. After years of treating online gambling as criminal, the…