The American Federation of Labor was almost drawn into the whirlpool of partisan politics during the Presidential campaign of 1896. Three successive conventions had declared in favor of the free coinage of silver; and now the Democratic party had come out for free coinage. In this situation very many prominent trade union leaders declared publicly for Bryan. President Gompers, however, issued a warning to all affiliated unions to keep out of partisan politics. Notwithstanding this Secretary McGraith, at the next convention of the Federation, charged President Gompers with acting in collusion with the Democratic headquarters throughout the campaign in aid of Bryan's candidacy. After a lengthy secret session the convention approved the conduct of Gompers. Free silver continued to be endorsed annually down to the convention of 1898, when the return of industrial prosperity and rising prices put an end to it as a demand advocated by labor. The depressed nineties demonstrated conclusively that a new era had arrived. No longer was the labor movement a mere plaything of the alternating waves of prosperity and depression. Formerly, as we saw, it had centered on economic or trade-union action during prosperity only to change abruptly to "panaceas" and politics with the descent of depression. Now the movement, notwithstanding possible changes in membership, and persistent political leanings in some portions of it, as a whole for the first time became stable in purpose and action. Trade unionism has won over politics. This victory was synchronous with the first successful working out of a national trade agreement and the institutionalization of trade unionism in a leading industry, namely stove molding. While one of the earliest stable trade agreements in a conspicuous trade covering a local field was a bricklayers' agreement in Chicago in 1887, the era of trade agreements really dates from the national system established in the stove foundry industry in 1891. It is true also that the iron and steel workers had worked under a national trade agreement since 1866. However, that trade was too exceptionally strong to be typical.