What kind of campaign funds are subject to clear limits on how much can be raised but not on how much is spent?

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Hard money refers to funds that are subject to clear limits on how much can be raised, but not on how much is spent. These limits are set by the Federal Election Commission (FEC) and apply to donations made directly to political candidates or political parties. Soft money refers to funds that are not subject to these limits and can be raised and spent by political parties for activities that are not directly tied to a specific candidate's campaign. Independent expenditures refer to funds spent by individuals or groups to influence an election without coordinating with a candidate's campaign. Political action committees (PACs) are groups that raise and spend funds to support or oppose candidates or issues, and can use a combination of hard and soft money. Spending limits refer to restrictions on how much candidates can spend on their campaigns overall.

What Kind of Campaign Funds Are Subject to Clear Limits