Answer:
20 states.
Step-by-step explanation:
According to Federal Election Commission in the United States, in specifying the primary matching fund, it stated that "A presidential candidate must establish eligibility by showing broad-based public support. He or she must raise more than $5,000 in each of at least 20 states."
Hence, to be eligible to receive this money, a candidate trying to win a party's nomination for president must first raise at least $5,000 from private contributions in each of at least "20 states."