Historical clue formulations

• U.S. president during the moon landing — 2025-01-12
• He placed a call to Armstrong and Aldrin minutes after their landing — 2024-05-05
• Who famously said "I'm not a crook" — 2017-08-15
• President who launched the war on drugs — 2017-07-04
• U.S. president who becomes the president of future Earth on "Futurama" — 2017-04-26
• First president to visit China — 2016-09-19
• Landslide winner of 1972 — 2014-12-02
• He once placed a "long-distance call" to Aldrin and Armstrong — 2011-06-14
• Subject of a museum in Yorba Linda, Calif. — 2009-11-08
• "Frost/___," 2008 nominee for Best Picture — 2009-03-31
• Two-time Time Man of the Year (and a hint to 17-, 27-, 41- and 54-Across) — 2008-10-02
• 1974 pardon recipient — 2008-03-19
• Resigned president — 2002-06-12
• 1995 Oliver Stone film — 2002-05-12
• Saturday Night Massacre figure — 2001-02-17
• Kissinger's boss, once — 2000-04-11
• Winner of 1968 and 1972 — 1999-12-06
• Stager of a 1968 political comeback — 1999-08-04
• President with an enemies list — 1999-05-12
• Checkers master — 1995-02-08