> No incumbent President has lost reelection in wartime This is not a particularly useful thing to say. Incumbents rarely lose anyway - it's only happened 3 ti

> No incumbent President has lost reelection in wartime This is not a particularly useful thing to say. Incumbents rarely lose anyway - it's only happened 3 times since WW2. Additionally, you have incumbents like Johnson who was so unpopular that he lost his parties' primary contest.