Question: The 16th President of the United States named which man the U.S. Attorney General after arguing a case for Polly Berry?

Context paragraphs:
Curtis Osborne: Curtis Osborne (1970 – June 4, 2008) was an American convicted murderer on death row in Georgia from Spalding County, Georgia.  He murdered Arthur Lee Jones and Linda Lisa Seaborne in 1990 to avoid paying a $400 debt.  Johnny Mostiler, his court-appointed attorney, allegedly neglected to inform Osborne that the prosecutor had offered him life sentence in exchange for a plea bargain, declaring "The little nigger deserves the death penalty."  Osborne's case for clemency was championed by former U.S. President Jimmy Carter and former Deputy U.S. Attorney General Larry Thompson, who wrote letters to the clemency board pleading for mercy.  Former U.S. Attorney General Griffin Bell also spoke on his behalf.  His execution was carried out despite these appeals.

Bryan Schroder: Bryan Schroder is an American attorney who is the Acting United States Attorney for the United States District Court for the District of Alaska.  He is President Donald Trump's nominee to become the U.S. Attorney for the District of Alaska.  Schroder has worked at the U.S. Attorney's Office in the District of Alaska since 2005.  Before becoming the Acting U.S. Attorney, he was the first assistant U.S. attorney, chief of the criminal division, anti-terrorism prosecutor, and district ethics adviser.  He has prosecuted cases involving violent crimes, drug distribution, gun crimes, fraud, tax evasion, environmental crimes, and fisheries and wildlife offenses.

Michael Mukasey: ( ; born July 28, 1941) is a lawyer and former federal judge who served as the 81st Attorney General of the United States.  He was appointed as Attorney General by President George W. Bush following the resignation of Alberto Gonzales.  Mukasey also served for 18 years as a United States District Judge of the United States District Court for the Southern District of New York, six of those years as Chief Judge.  He is the recipient of several awards, most notably the "Learned Hand Medal" of the Federal Bar Council.  Mukasey was the second Jewish U.S. Attorney General.  Mukasey is currently a partner at the international law firm Debevoise & Plimpton.

Francis McNulty, Jr.: Francis McNulty, Jr. was a Republican member of the Iowa House of Representatives from 1896 to 1898.  Originally from Michigan where he graduated from the University of Michigan Law School at Ann Arbor, Michigan, McNulty removed to Sioux City, Iowa where he practiced law and served as a state representative in the Iowa General Assembly.  He represented District 58 in Woodbury County, Iowa.  Not a year after his term of office ended, after gold was discovered in Nome, Alaska (Cape Nome) in 1899, McNulty moved there.  He practiced law in Nome, arguing cases before the United States District Court of the Territory of Alaska (Est. 1884).  At least one of his successfully argued cases is published.  In 1904, Republican Philander C. Knox, United States Attorney General in the Cabinets of both U.S. Presidents William McKinley and Theodore Roosevelt, and the 7 term U.S. Senator from Iowa (prior having served four terms as a U.S. Representative from the state) Republican William B. Allison both endorsed McNulty for appointment as U.S. Attorney for the District of Alaska.  The position had been recently vacated by Marvin Grisby.

Polly Berry: Polly Berry, also known as Polly Crockett and Polly Wash (b. ca. 1818 – d. ca. 1870–1880), was an enslaved African-American woman who on October 3, 1839 filed a freedom suit in St. Louis, Missouri, which she won in 1843 based on having been held illegally as a slave for an extended period of time in the free state of Illinois.  In 1842 Berry sued for the freedom of her daughter Lucy Ann Berry, based on "partus sequitur ventrem" (the child is born into the status of the mother), which she won in 1844 in a case argued by Edward Bates, the future U.S. Attorney General under President Abraham Lincoln.

Joshua Minkler: Joshua Minkler is an American attorney.  Currently serving as the interim United States Attorney for the United States District Court for the Southern District of Indiana, he has been nominated by President Donald Trump to become the permanent U.S. Attorney for the same district.  Prior to becoming interim U.S. Attorney in June 2015, Minkler served for 21 years as an Assistant U.S. Attorney in the Southern District of Indiana, where he held the positions of First Assistant United States Attorney and Chief of the Drug and Violent Crime Unit.  Before he joined the U.S. Attorney's office, Minkler served for five years as an assistant prosecuting attorney in the office of the Kent County, Michigan prosecuting attorney, where he prosecuted violent crimes.

Edwards Pierrepont: Edwards Pierrepont (March 4, 1817 – March 6, 1892) was a popular American attorney, reformer, jurist, traveler, New York U.S. Attorney, U.S. Attorney General, U.S. Minister to England, and orator.  Having graduated from Yale in 1837, Pierrepont studied law and was admitted to the bar in 1840.  During the American Civil War, Pierrepont was a Democrat, although he supported President Abraham Lincoln.  Pierrepont initially supported President Andrew Johnson's conservative Reconstruction efforts having opposed the Radical Republicans.  In both 1868 and 1872, Pierrepont supported Ulysses S. Grant for President.  For his support, President Grant appointed Pierrepont United States Attorney in 1869.  In 1871, Pierrepont gained the reputation as a solid reformer, having joined New York's "Committee of Seventy" that shut down Boss Tweed's corrupt Tammany Hall.  In 1872, Pierrepont modified his views on Reconstruction and stated that African American freedman's rights needed to be protected.

Abraham Lincoln: Abraham Lincoln ( ; February 12, 1809 – April 15, 1865) was an American politician and lawyer who served as the 16th President of the United States from March 1861 until his assassination in April 1865.  Lincoln led the United States through its Civil War—its bloodiest war and perhaps its greatest moral, constitutional, and political crisis.  In doing so, he preserved the Union, paved the way to the abolition of slavery, strengthened the federal government, and modernized the economy.

John W. Huber: John W. Huber is an American lawyer who has served as the United States Attorney for the District of Utah since June 2015.  He was first nominated for the position by President Barack Obama in February 2015.  Huber offered his resignation in March 2017 at the request of the Trump administration.  However, United States Attorney General Jeff Sessions subsequently appointed Huber as interim U.S. Attorney under the Federal Vacancies Reform Act.  Huber was renominated by President Donald Trump in June 2017.  On August 3, 2017, he was unanimously confirmed by the United States Senate to an additional four-year term as a U.S. Attorney.

Ebenezer R. Hoar: Ebenezer Rockwood Hoar (February 21, 1816 – January 31, 1895) was an American politician, lawyer, and justice from Massachusetts.  He was appointed U.S. Attorney General in 1869 by President Ulysses S. Grant; he became the first U.S. Attorney General to head the newly created Department of Justice in July 1870.  As Attorney General Hoar worked with President Ulysses S. Grant and Secretary of State Hamilton Fish over contentious issues as settling the Alabama Claims with England and in keeping the United States from recognizing Cuban belligerency during the Ten Years' War.  Hoar assisted Grant in appointing two Supreme Court justices that helped overturn a decision outlawing paper money as legal tender.  Hoar himself, nominated by President Grant, was rejected by the Senate to fill a Supreme Court vacancy, in part due to senators' dismay over Hoar's resistance to distribution of federal patronage jobs without regard to the job applicant's capabilities.

Supporting paragraphs: Polly Berry Abraham Lincoln
Answer: Edward Bates