Fundraising in the 2020 United States presidential election
Fundraising plays a central role in many presidential campaigns, and is a key factor (others include endorsements/messaging/visits/staffers) in determining the viability of candidates. Money raised is applied for the salaries of non-volunteers in the campaign, transportation, campaign materials, media advertisements and other contingencies.
Source: Wikipedia — Fundraising in the 2020 United States presidential election (CC BY-SA 4.0)