[e] On the other hand, Taft's opinion in United States v. Addyston Pipe and Steel Co.[f] was upheld unanimously by the high court.[g] Taft's opinion, in which he held that a pipe manufacturers' association had violated the Sherman Antitrust Act,[22] was described by Henry Pringle, his biographer, as having "definitely and specifically revived" that legislation.[23]
In 1896, Taft became dean and Professor of Property at his alma mater, the Cincinnati Law School, a post that required him to prepare and give two hour-long lectures each week.[24] He was devoted to his law school, and was deeply committed to legal education, introducing the case method to the curriculum.[25] As a federal judge, Taft could not involve himself with politics, but followed it closely, remaining a Republican supporter. He watched with some disbelief as the campaign of Ohio Governor William McKinley developed in 1894 and 1895, writing "I cannot find anybody in Washington who wants him".[25] By March 1896, Taft realized that McKinley would likely be nominated, and was lukewarm in his support. 