JD Vance's status as sitting vice president and consistent leader in Republican primary polling has anchored trader sentiment, positioning him as the early GOP frontrunner ahead of Marco Rubio and others. The Democratic side remains fragmented with no declared frontrunner, as national surveys show Kamala Harris ahead but Alexandria Ocasio-Cortez and Jon Ossoff drawing notable market interest amid a wide field including Gavin Newsom and Pete Buttigieg. With no major candidates formally entering the race and the 2026 midterms approaching as a key test of party momentum, the broad distribution of probabilities reflects uncertainty over primary outcomes, general-election matchups, and potential late shifts from economic conditions or party dynamics.