Historical clue formulations

• Doritos ___ Tacos (fast-food offering) — 2020-07-11
• Nut jobs — 2017-01-10
• Nutcases — 2012-11-25
• Nut jobs — 2010-12-07
• Crackpots — 2008-12-13
• Nutcases — 2007-07-12