Who will be the Republican Party's official nominee for the 2028 presidential election?

Context: Vice President JD Vance and President Donald Trump are the two leading potential Republican candidates for 2028. Vance currently leads in primary polling, but Trump has not ruled out running despite constitutional term limits.

Resolution: This market resolves to whichever candidate is officially nominated by the Republican Party at the 2028 Republican National Convention or through the formal RNC nomination process. If neither Vance nor Trump is nominated, the market resolves to "Other."

Sources for verification:

• Republican National Committee official announcements

• 2028 Republican National Convention proceedings

• Major news outlets covering the nomination

• Official RNC website and press releases