(CNN) — Former President Donald Trump holds a wide lead over his Republican presidential competitors among likely GOP caucusgoers in Iowa, the final Des Moines Register/NBC News/Mediacom poll before Monday’s caucuses found. Overall, 48% of likely caucusgoers say Trump would be their first choice, 20% name former South Carolina Gov. Nikki Haley, and 16% Florida Gov. Ron DeSantis, […]