WASHINGTON — The Board of Governors of the U.S. Postal Service is bracing for an attempted takeover by the Trump administration and has retained outside counsel to fight any executive order to that effect, according to two sources with knowledge of the board’s plans.

The board’s nine members, who are appointed by the president and confirmed by the Senate, held an emergency meeting after the Senate confirmed Howard Lutnick for commerce secretary on Wednesday, the sources said. In December,…