Bush’s overall familiarity among Republicans — defined as the percentage who know him well enough to rate him either positively or negatively — was already high (81%) when Gallup began tracking the candidate images in mid-July. That score has since edged upward, to 89%, second only to Donald Trump’s 94% among the major GOP candidates.

But Bush’s campaign efforts since July have clearly moved his image in a negative direction. The percentage of Republicans with a favorable opinion of Bush has dropped 10 percentage points, while the percentage with an unfavorable opinion has increased 18 points.

On a relative basis, Bush’s current -1 net favorable rating among Republicans and Republican-leaning independents is the worst of any major GOP candidate — lower than John Kasich’s +5, and well below seven other GOP candidates Gallup is tracking.