New York Rep. Michael Grimm pleaded guilty to a single count of tax fraud Tuesday in Brooklyn federal court. The guilty plea comes one month after the congressman, a Republican who represents Staten Island, was elected to a third term. In April, Grimm was named in a 20-count indictment that accused him of under-reporting the payroll and earnings of his Upper East Side restaurant, Healthalicious, which he ran from 2007 to 2010. He pleaded not guilty in federal court and was released on bond. Prosecutors alleged Grimm employed a number of immigrant workers who did not have legal status to...