Posted: May 27, 2019 at 2:44 pm TWG Source Another Rule Trump Could Break: Primary Challengers Doom Incumbent Presidents The last three sitting presidents to lose reelection — George H.W. Bush, Jimmy Carter and Gerald Ford — all faced strong opponents within their parties. But Trump has strengths they did not. Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment Name * Email * Website Notify me of follow-up comments by email. Notify me of new posts by email.