Use for Bona Fide Campaign or Political Purposes
In General. While House rules provide that campaign funds may be used for “bona fide campaign or political purposes” only, the rules do not include a definition of that term. The Ethics Committee has long advised that each Member has wide discretion to determine whether any particular expenditure would serve such purposes, provided that the Member does not convert campaign funds to personal or official uses.
Put another way, the rule is not interpreted “to limit the use of campaign funds strictly to a Member’s reelection campaign,” but instead is interpreted “broadly to encompass the traditional politically-related activities of Members of Congress."52 Thus,
if a Member determines, for example, that advertisements in publications of civic organizations, the mailing of holiday greetings to constituents, or travel to meetings with local party officials, would constitute a political expenditure, as so defined, or are otherwise politically-related, then he may use campaign funds for that purpose.53
https:// ethics.house.gov/campaign-activity/proper-use-campaign-funds-and-resources