Former state Senate Democratic leader John Sampson on Tuesday lost a last-ditch bid to get an appeals court to delay his scheduled April 21 surrender date for the start of a 5-year sentence on federal corruption charges.

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Sampson was convicted in 2015 of obstruction of justice and lying to the FBI during an investigation of his embezzlement of escrow money to run a political campaign. He was sentenced in January. Sampson wanted the Second U.S. Circuit Court of Appeals to delay the prison term while his appeal is being heard.

A three-judge panel of the appeals court heard brief arguments from Sampson’s lawyer on Tuesday morning, and rejected the request in a brief order Tuesday afternoon.