He spoke about signing a six-week abortion ban, pressing for the death penalty for those convicted of sexually abusing children, and “even sending illegal aliens to Martha’s Vineyard.”
Mr. DeSantis injected more bits of his biography into his emerging stump speech than he did during his pre-candidacy. He invoked his mother’s work as a nurse, his father’s installation of Nielsen ratings boxes and his own minimum-wage jobs.
“I was given nothing,” Mr. DeSantis said.
His cadence at times felt rushed. He pushed so quickly through his speech that sections were swallowed by the crowd’s applause, which did not slow him down.
Mr. Trump, who has focused on Mr. DeSantis more than on all of his other rivals, is also set to visit Iowa on Wednesday and Thursday, meeting with local Republicans and faith leaders and holding a Fox News town hall event also in Clive.
Mr. DeSantis has positioned himself to the right of Mr. Trump on some key issues, including abortion, as part of an effort to woo right-wing voters. In his news conference, he accused Mr. Trump of shifting to the left.
“He’s not an orator, I don’t think,” said Matt Wells, a conservative activist who drove 120 miles from Washington, Iowa, to see Mr. DeSantis. “But you give him a question about policy and he’ll run with it. I have wanted someone for so long who, when they’re asked about policy, they have an answer for it right there.”
Kenneth Wayne, a retired physician from Clive, cited Mr. DeSantis’s leadership skills, including his military service, as a selling point. He said he had read Mr. DeSantis’s book cover-to-cover.