Illinois Speaker Michael Madigan NEXT? New York state Assembly Speaker Sheldon Silver was arrested on Thursday morning after a “long-term” investigation by the Federal Bureau of Investigation

The Manhattan Democrat turned himself in to FBI agents early Thursday in lower Manhattan. The nature of the charges weren’t released, but a person familiar with the matter said they related to a public-corruption investigation.

Mr. Silver, a lawyer who has been speaker since 1994, has been under scrutiny from federal prosecutors in Manhattan and the Federal Bureau of Investigation in relation to the source of his six-figure income. Mr. Silver earned between $650,000 and $750,000 from outside legal work in 2013, in addition to his $121,000 speaker salary, according state financial disclosure forms.

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