war chest
noun [ C ] informal uk/ˈwɔː ˌtʃest/ us/ˈwɔːr ˌtʃest/
（为需要经过漫长斗争而取得成功而筹集的）资金，款项
money that has been collected or saved to pay for something, especially a long fight to achieve something
The candidates are gathering money for their election war chests. 候选人为竞选筹集资金。