The market remains tightly contested between "Other" at 50% and Ted Cruz at 41.5%, as no major Republican has formally launched a 2028 bid amid focus on the November midterms. Cruz has driven his positioning through recent Iowa travel, book promotion, and interviews challenging the idea of J.D. Vance as the automatic successor, while signaling ongoing interest without a firm timeline. Vance, Marco Rubio, and Ron DeSantis continue prioritizing their current roles, with polling showing Vance leading but Rubio gaining ground in early states. This dynamic leaves substantial probability on an unlisted or lesser-known figure moving first, with separation likely hinging on post-midterm announcements, exploratory committee filings, or explicit statements from the listed contenders.