Do you favor or oppose the death penalty for persons convicted of murder?

Somewhat favor: 29%
Strongly favor: 36%

The second one found:

Some people say that the death penalty is unfair because most of the people who are executed are African-Americans. Do you favor or oppose the death penalty for persons convicted of murder?

Somewhat favor: 25%
Strongly favor: 52%

Total support jumped 12 points from 65% to 77%, while strong support jumped 16 points (36% to 52%).

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Additional results: Another condition replaced “mostly black” with “many innocents” with no significant effect. 50% of blacks favored the death penalty in the neutral phrasing, 38% in the “mostly black” condition, and 34% in the “many innocents” condition.