CHICAGO Newspapers perform a public service for democracy and should be allowed to operate as tax-exempt non-profits, U.S. Sen. Benjamin Cardin, D.-Md., proposed Tuesday. Cardin introduced a bill that would explicitly include newspapers among organizations eligible for 501(c)(3) status. The non-profit status is the same that public radio and television have now. The legislation would give a national green light for newspapers to adopt the so-called Low Profit Limited Liability Company business model, often shortened to L3C. The L3C model, which the Newspaper Guild supports as an alternative newspaper ownership model, is the subject of a feature story in the...