Historical clue formulations

• Illegal offering — 2024-02-04
• Subject of many a political scandal — 2023-04-30
• Illegal payment — 2021-07-13
• Grease — 2020-07-26
• Grease — 2018-12-07
• Bit of corruption — 2018-09-02
• Illegal payment — 2017-09-26
• Illegal payment — 2017-07-03
• Suborn — 2016-06-12
• Kickback — 2008-03-25
• "Oil" — 2004-11-27
• Illegal inducement — 2001-06-25
• Hush money — 1997-07-09
• Payola — 1994-10-25
• Illegal inducement — 1994-02-28