Overall Republican favorable opinion of Ted Cruz has tanked 19 points from 60% to 41% between early May and late July in CNN/ORC polls.
Huffpo deliberately overstates the data here by comparing apples and oranges, but the decline in Cruz' favorables among Republicans is huge nonetheless: a decline of almost 32%. But worse are Ted Cruz' unfavorables among Republicans which went up 14 points, from 35% to 49% of Republicans, a whopping 40% increase in his unfavorability.
Bang! And you're dead.