As John McCainJohn McCainManchin bashes GOP candidate for pushing McCain to resign McCain’s primary challenger asks him to step aside after diagnosis Sen. McCain goes on hike after cancer diagnosis MORE and Barack ObamaBarack ObamaTrump's forgotten man and woman — still forgotten Jeb Bush calls out Republicans silent on Trump's Russia probe Trump launches all-out assault on Mueller probe MORE flesh out their stances on a wide range of issues this summer, their positions on Iraq separate them most drastically in voters' minds, Rasmussen found.

Americans overwhelmingly say Iraq is the top priority for both candidates, and their goals for Iraq policy are diametrically opposed.

According to Rasmussen, 76 percent of voters think McCain's top priority will be ensuring victory in Iraq; among Democrats, meanwhile, 78 percent think Obama's top priority will be withdrawal.