Historical clue formulations

• *U.S. leader who said "Do I not destroy my enemies when I make them my friends?" — 2019-11-19
• Prez who delivered a famous address on Nov. 19, 1863 — 2013-11-19
• Political leader who patented a system to alter the buoyancy of steamboats — 2011-05-28
• First president born outside the original 13 colonies — 2005-11-28
• Union man? — 2001-10-12