Bush-Rubio rivalry intensifies as Iowa caucuses draw closer

Republican presidential candidate, former Florida Gov. Jeb Bush, speaks at the Iowa GOP's Growth and Opportunity Party at the Iowa state fair grounds in Des Moines, Iowa, Saturday, Oct. 31, 2015. (AP Photo/Nati Harnik)DES MOINES, Iowa (AP) — Neither Jeb Bush nor Marco Rubio emphasized the need to do well in Iowa in the early months of the 2016 presidential campaign. But that’s changed as their rivalry intensifies and pressure mounts to emerge from the Feb. 1 caucuses as the favorite among mainstream conservatives.

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