The Iowa State Fair Saw Many G.O.P. Candidates but Only One Trump Donald J. Trump asserted his dominance in Iowa on Saturday as he squared off against his closest rival, Ron DeSantis, in the Super Bowl of retail politics. http://web.archive.org/web/20230813005718/https://www.nytimes.com/2023/08/12/us/politics/trump-desantis-iowa-state-fair.html