What argument do critics of affirmative action often make? affirmative action supports the majority. affirmative action goes against the constitution. affirmative action is a form of gender discrimination. affirmative action discriminates against minority groups.

The argument that they make is affirmative action goes against the Constitution.
affirmative action gives a certain advantage to the minority groups in some recruitment process. The critics of affirmative actions argued that favoring a certain social group is contradicting constitution who guarantee equal treatment for all citizens. 

Critics often argues that affirmative action is taken by a majority of the group and hence what is being decided by a majority is considered as an affirmative action. In this whole process, the action is based on the decision made by majority and hence the interest of the minority is ignored. The action is not necessarily meant to fulfill the interest of minority groups.