1983 to 1989, he served as Connecticut Attorney General. Lieberman argued one case before the United States Supreme Court, Estate of Thornton v. Caldor, Inc., a free exercise case involving Connecticut's repeal of its blue laws. In the 1986 general election, Lieberman won more votes than any other Democrat on the statewide ticket, including Governor William O'Neill. As Attorney General, Lieberman emphasized consumer protection and environmental enforcement. U.S. Senate Tenure Lieberman was first elected to the United States Senate as a Democrat in the 1988 election, defeating liberal Republican Lowell Weicker by a margin of 10,000 votes. He scored the nation's biggest political upset that year, after being backed by a coalition of Democrats and unaffiliated voters with support from conservative Republicans, most notably including National Review founder and Firing Line host William F. Buckley, Jr. and his brother, former New York Senator James L. Buckley, who were disappointed in three-term Republican incumbent Weicker's liberal voting record and personal style. During the campaign, he received support from Connecticut's Cuban American community which was unhappy with Weicker. Lieberman has since remained firmly anti-Castro. Shortly after his first election to the Senate, Lieberman was approached by incoming Majority Leader George Mitchell who advised him, "Pick out two or three areas that you're really interested in and learn them so that your colleagues know what you're talking about[...] You're going to have more influence even as a freshman than you think because you know there's hundreds of issues and inevitably we rely on each other." Recalling the conversation, Lieberman has said, "that was true when I first came in, although you could see partisanship beginning to eat away at that. But at the end of my 24 years, it was really so partisan that it was hard to make the combinations to get to 60 votes to break a filibuster to get things done." Lieberman's initiatives against violence in video games are considered the chief impetus behind the establishment of an industry-wide video game rating system during the early 1990s. In 1994, Lieberman made history by winning by the largest landslide ever in a Connecticut Senate race, drawing 67 percent of the vote and beating his opponent by more than 350,000 votes. Like Bill Clinton and Dick Gephardt, Lieberman served as chair of the Democratic Leadership Council from 1995 to 2001. In 1998, Lieberman was the first prominent Democrat to publicly challenge Clinton