No major candidates have formally declared for the 2028 presidential nomination as of late August 2026, leaving the field open following the constitutional bar on a third Trump term. Trader consensus reflects high implied probabilities for early announcements by figures such as Vice President JD Vance and former Vice President Kamala Harris, driven by their consistent leads in national primary polling and visible positioning through fundraising, endorsements, and media appearances. Democrats face a fragmented contest with governors like Gavin Newsom and Josh Shapiro alongside senators and progressives, while Republicans center on succession dynamics involving Secretary of State Marco Rubio and others. The DNC’s recent approval of a revised primary calendar emphasizing South Carolina and diverse states adds structural context ahead of the November 2026 midterms. Historical patterns indicate the bulk of declarations will follow those elections through 2027, though exploratory committees and candidate statements could accelerate timelines for select contenders.