The Daily Caller references Trey Kovac's article to understand how card check supresses worker's voice.
A main focus of the measure would be the implementation of a union election process known as card check. The bill would do this by allowing the National Labor Relations Board (NLRB) to certify a union if a majority of eligible workers sign authorization cards. Critics, however, have argued card check suppresses workers from freely expressing their views on unionizing. As the Competitive Enterprise Institute noted, this is because signing cards instead of a secret ballot election makes votes public knowledge and in turn makes workers opposed to the union open to intimidation.