Was the Missouri Compromise legal?

密苏里妥协法案是否合法？

youdao

He said the South would accept nothing less than extending the Missouri compromise line west to the Pacific Ocean.

VOA: special.2009.03.19

It was free because Congress -- in the Missouri Compromise of Eighteen Twenty -- made slavery illegal in that area.

VOA: special.2009.05.14

They proposed that the line of the Missouri Compromise be pushed west,all the way to the Pacific Coast.

VOA: special.2009.02.26

The trouble with the Missouri compromise is that it is negative: the strategy depends on Mr Bush continuing to flounder.

ECONOMIST: John Kerry's running-mate

Taney, writing for the majority, voided the Missouri Compromise by arguing that Congress could not prohibit slavery in the territories.

NEWYORKER: Benched

From the Alien and Sedition Acts and the Missouri Compromise to the election of Abraham Lincoln, every development is given careful study.

ECONOMIST: American democracy