Dred Scott

There are mistakes which happen in live formats, and mistakes which are pre-fabbed, deliberate, and therefore you're held accountable for. Mistakes involving the issue of slavery are particularly offensive, no matter what the mistake.
Bush said:

Another example would be the Dred Scott case, which is where judges years ago said that the constitution allowed slavery because of personal property rights.

Dred Scott wasn't based on property rights. It was based on racism.

The decision of the court was read in March of 1857. Chief Justice Roger B. Taney -- a staunch supporter of slavery -- wrote the "majority opinion" for the court. It stated that because Scott was black, he was not a citizen and therefore had no right to sue. The decision also declared the Missouri Compromise of 1820, legislation which restricted slavery in certain territories, unconstitutional.