Mercury Retrograde in Leo (4th House): A Collective Reset for the American Psyche When the Nation’s Mind Hits Rewind This summer, Mercury stations retrograde in Leo (4th House), a Mercury Retrograde in Leo (4th House): A Collective Reset for the American Psyche When the Nation’s Mind Hits Rewind This summer, Mercury stations retrograde in Leo (4th House), a transit that will prompt everyone to reevaluate pride, family, and emotional expression from July 18