The exact purpose of the maneuver was not clear — and left some delegates puzzled and alarmed. People familiar with the meeting, who spoke on the condition of anonymity to discuss private conversations, said perhaps the intent was to block an undesirable running mate.

Most of the dozen GOP officials or activists interviewed by The Washington Post even ventured that the aim may have been to substitute former national security adviser Michael Flynn for Trump if the former president is sentenced to prison time. Among some on the far right, suspicions have intensified that the former president has surrounded himself with too many advisers beholden to the “deep state.”