This politician was bailed out of extensive debts by his college classmate Richard Blatchford who, with him, founded the law firm that became Cravath, Swaine & Moore. This politician used one of the first insanity pleas in US history when he was an attorney for a Black man accused of horse theft, Bill Freeman. After this man’s successful 1838 gubernatorial campaign, the “Hunker” faction consolidated around his opponent William Marcy. As a Senator, this man opposed the Compromise of 1850, declaring that there was a “higher law than the Constitution.” He negotiated a land transfer with minister Eduard de Stoeckl (“STOIK-ull”) and survived an assassination attempt by Lewis Powell. For 10 points, what Secretary of State negotiated with Tsar Alexander II’s government to purchase Alaska? ■END■