Jack Schlossberg, the grandson of John F. Kennedy, is among a slate of Democrats seeking to replace Representative Jerrold Nadler of New York.

The Justice Department has asked to dismiss a federal corruption case against the New York mayor, prompting resignations and calls for the judge to reject the request.

By exercising restraint in their latest redistricting effort, Democratic lawmakers hope to avoid a lawsuit from Republicans, while still helping their party’s candidates.