Court records show that the case was assigned Tuesday to Judge Emmet Sullivan, the same judge who presided over the criminal case against former White House national security adviser Michael Flynn and who in early November ordered the U.S. Postal Service to sweep facilities in states including Georgia and Michigan to ensure that mail-in ballots were delivered. The new lawsuit asks the court to declare that Trump’s campaign engaged in conduct that violated the Voting Rights Act and seeks to prohibit the campaign, and anyone acting in concert or on its behalf, from “continuing to exert pressure on state or...