Final answer:
Social Security is referred to as the "third rail" of American politics, meaning it is a politically sensitive topic that most politicians are cautious to handle due to the potential backlash from voters.
Step-by-step explanation:
Which of the following is referred to as the "third rail" of American politics? The term "third rail" refers to an issue that is considered so controversial and politically sensitive that politicians avoid it due to the potential for negative political consequences. The correct answer is Social Security. Over the decades, Social Security has become an essential safety net for retirees, those with disabilities, and survivors. Politicians are often wary of making substantial changes to this program for fear of backlash from voters who rely on these benefits.
Social safety net programs like Temporary Assistance to Needy Families (TANF), Supplemental Nutrition Assistance Program (SNAP), and unemployment insurance are also important components of the nation's efforts to combat poverty and provide security to vulnerable populations. However, Social Security is unique for its wide reach and the perceived political danger in attempting to reform it.
As a vital component of the government's commitment to economic security, Social Security represents a key effort to prevent elderly Americans from falling into poverty and to support the economic stability of families that lose an income earner.