Hard money refers to political donations that are regulated by law, specifically by the Federal Election Commission (FEC), and can only be used for specific purposes related to campaign financing. These funds come from individuals or political action committees (PACs) and must comply with strict limits on how much can be contributed, which ensures transparency and accountability in the electoral process. Unlike soft money, which can be used for party-building activities and is less regulated, hard money is closely monitored to prevent corruption and the influence of wealthy donors on elections.