Question: Who was the Chief Justice behind the Supreme Court decision where Robert Cooper Grier served as a juror, which denied a "negro" could an American citizenship?

<P0-S0>  As a rare Northern member of the majority in the infamous 1857 Dred Scott decision, Grier concurred that African Americans were not—and were never meant to be—citizens of the United States and that the property rights of slaveholders were clearly protected in the Constitution. <P0-S1> Robert Cooper Grier (March 5, 1794 – September 25, 1870), was an American jurist who served on the Supreme Court of the United States. <P0-S2>  A Jacksonian Democrat from Pennsylvania who served from 1846 to 1870, Grier weighed in on some of the most important cases of the 19th century. <P0-S3>  However, Grier wrote the majority opinion in the 1863 Prize Cases, upholding Abraham Lincoln’s presidential power to institute Union blockades of Confederate ports and giving the Union Army a strategic advantage in the American Civil War. <SEP> <P1-S0> Prize Cases, 67 U.S. 635 (1863), was a case argued before the Supreme Court of the United States in 1862 during the American Civil War. <P1-S1>  The Supreme Court's decision declared constitutional the blockade of the Southern ports ordered by President Abraham Lincoln. <P1-S2>  The opinion in the case was written by Supreme Court Justice Robert Cooper Grier. <SEP> <P2-S0> Dred Scott v. Sandford, 60 U.S. 393 (1857) , also known simply as the Dred Scott case, was a landmark decision by the United States Supreme Court on US labor law and constitutional law. <P2-S1>  Dred Scott, an enslaved man of "the negro African race" who had been taken by his owners to free states and territories, attempted to sue for his freedom. <P2-S2>  It held that "a negro, whose ancestors were imported into [the U.S.], and sold as slaves", whether enslaved or free, could not be an American citizen and therefore had no standing to sue in federal court, and that the federal government had no power to regulate slavery in the federal territories acquired after the creation of the United States. <P2-S3>  In a 7–2 decision written by Chief Justice Roger B. Taney, the court denied Scott's request. <P2-S4>  The decision was only the second time that the Supreme Court had ruled an Act of Congress to be unconstitutional. <SEP> <P3-S0> The Taney Court refers to the Supreme Court of the United States from 1836 to 1864, when Roger Taney served as the fifth Chief Justice of the United States. <P3-S1>  Taney succeeded John Marshall as Chief Justice after Marshall's death in 1835. <P3-S2>  Taney served as Chief Justice until his death in 1864, at which point Salmon P. Chase took office. <P3-S3>  Taney had been an important member of Andrew Jackson's administration, an advocate of Jacksonian democracy, and had played a major role in the Bank War, during which Taney wrote a memo questioning the Supreme Court's power of judicial review. <P3-S4>  However, the Taney Court did not strongly break from the decisions and precedents of the Marshall Court, as it continued to uphold a strong federal government with an independent judiciary. <P3-S5>  Most of the Taney Court's holdings are overshadowed by the "Dred Scott" decision, in which the court ruled that African-Americans could not be citizens. However, the Taney Court's decisions regarding economic issues and separation of powers set important precedents, and the Taney Court has been lauded for its ability to adapt regulatory law to a country undergoing remarkable technological and economic progress.