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Many lobbyists are also investors in the industries they represent, creating potential conflicts of interest as they study and seek to influence regulators and policymakers, The Wall Street Journal reports. There's little oversight of lobbyists' investments, and insider trading rules are hard to apply to Washington policy professionals, experts say. "It's the Wild West," says lobbyist Howard Marlowe. "I don't know of anyone who has rules. ... It's a blind spot."

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