Former congressman and former FBI agent Mike Grimm of New York, a Republican who until December had represented Staten Island and a slice of Brooklyn for two terms in the House, was just sentenced to eight months in prison as part of a plea deal with prosecutors. Federal law enforcement officials had conducted a lengthy investigation of Grimm over a series of alleged campaign finance transgressions, but they wound up indicting him in April of last year on charges of tax evasion, fraud, and perjury regarding his hiring of illegal immigrants to work at a restaurant he owned before entering Congress in 2011. Grimm ultimately pleaded guilty to a single count of tax fraud just before Christmas and resigned his office a couple of weeks later.