Historical clue formulations

• Defeater of Nixon in 1960 — 2017-07-10
• Powell's successor on the Supreme Court — 2014-01-26
• 1961 leader — 2011-04-08
• President who said "I'm an idealist without illusions" — 2010-09-26
• Anthony of the Supreme Court — 2010-09-14
• Castro's "enemy to whom we had become accustomed" — 2010-08-13
• Successor to Powell on the Supreme Court — 2009-09-26
• See 42-Across — 2005-08-12
• 50¢ — 2005-02-06
• Half profile? — 2004-10-09
• See 17-Across — 2004-07-28
• Supreme Court justice appointed by Reagan — 2003-03-02
• Presidential seal flip side — 2002-12-10
• Half portrait — 1999-02-06
• Supreme Court Justice — 1995-07-29