A "campaign fundraiser" refers to an event or effort organized to raise money for a political campaign. It helps gather financial support for a candidate running for public office. Full definition
This screen - print was created as part of a 1980s Campaign fundraiser for John Brademas, former Congressman of Indiana, who later became President of New York University. (chairish.com)
Presumptive Democratic presidential nominee Hillary Clinton attends campaign fundraisers in New York and New Jersey today. (nystateofpolitics.com)
By comparison, the mayor took on a major role in the elections last year — speaking at campaign fundraisers and dispatching his top political aide, intergovernmental affairs director Emma Wolfe, to work on the races. (politico.com)