President Trump has consistently declined to endorse Vice President JD Vance as his 2028 Republican successor, most recently in early February 2026 interviews where he praised Vance as "very capable" alongside Secretary of State Marco Rubio and others, calling it "too early" to choose amid a crowded field of potential candidates. This pattern of strategic ambiguity—evident since mid-2025—reflects Trump's focus on current-term priorities like policy implementation and midterm preparations, while maintaining leverage over the GOP primary. Absent any official statement or campaign action from Trump despite ongoing speculation, traders price an 87.5% implied probability on no endorsement before 2027, viewing high barriers like term-limit dynamics and intra-party rivalries as unlikely to shift soon.