How can interest groups contribute money to a candidate?

Federal multi-candidate PACs may contribute to candidates as follows: $5,000 to a candidate or candidate committee for each election (primary and general elections count as separate elections); $15,000 to a political party per year; and. $5,000 to another PAC per year.

Explanation:

or they can make super PAC with much larger undisclosed amounts of money

the primary goal of much of the money that flows through U. S. politics is this: ... We also track how much interest groups have been spending on lobbying, which ... pool contributions from individuals and distribute them to candidate