Answer:
Yes, earnings can be used to run campaigns. Candidates can use their personal funds for campaign purposes, which are considered contributions to their campaigns and are not subject to any limits, but they must be reported[1]. Additionally, campaign funds may be used to make salary payments to members of the candidate’s family if they are providing a bona fide service to the campaign and the payments reflect the fair market value of those services[2]. Campaign funding is essential for candidates, and they can raise funds from individuals, political party committees, and political action committees to support their campaigns[3]. After elections, there are rules in place for how campaign contributions can be used, including donations to charities and refunds to donors[5]. Therefore, candidates can use their earnings and other sources of income to fund their campaigns, subject to specific regulations and reporting requirements.
Sources
[1] Using the personal funds of the candidate - FEC.gov https://www.fec.gov/help-candidates-and-committees/candidate-taking-receipts/using-personal-funds-candidate/
[2] Personal use - FEC.gov https://www.fec.gov/help-candidates-and-committees/making-disbursements/personal-use/
[3] How Does Campaign Funding Work? https://scienceexchange.caltech.edu/topics/voting-elections/campaign-funding-finance-explained
[4] FAQ (Frequently Asked Questions) https://www.microworkers.com/faq.php
[5] What Happens to Campaign Contributions After Elections? https://www.investopedia.com/articles/markets/042716/what-happens-campaign-funds-after-elections.asp
