Truman also unsuccessfully vetoed the Taft–Hartley Act, which among other provisions denied trade unions National Labor Relations Board protection unless union leaders signed affidavits swearing they were not and had never been Communists.
”杜鲁门在否决《塔夫脱-哈特莱法案》上也遭到失败，该法案与其他条例取消了工会在全美劳资关系理事会上的保护，除非工会领袖签署宣誓书，宣誓他们不是也从来不是共产党员。