All Eyes on Walker, Rubio at the Iowa Hog and Hog Event

Two of the top Republican performers in a recent Iowa Poll try to become the leader of the pack.

Scott Walker, governor of Wisconsin, second in line, and Senator Joni Ernst, a Republican from Iowa, front, ride motorcycles during a group ride in Des Moines, Iowa, U.S., on Saturday, June 6, 2015. Iowa Senator Joni Ernst is hosting the inaugural Roast and Ride event which featured a 38-mile ride from a Des Moines Harley Davidson dealership to the Central Iowa Expo where seven current and potential Republican presidential candidates are expected to speak.

Photographer: Daniel Acker/Bloomberg

One arrived in a navy-blue Chevrolet Traverse sport-utility vehicle, while the other rode in on a rented 2014 Harley-Davidson Road King motorcycle.

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