I can't believe I have to "ask" for this feature, but here goes: We should have a way to filter or query for failed transactions in NationBuilder. Currently, the process I've been told to follow is to look at each supporter profile MANUALLY to see if their transaction failed. This is absolutely absurd and incredibly unsustainable for anyone running a fundraising program using this tool. The data is clearly being recorded in the financial portion of supporters' profiles in NationBuilder, so a filter should be able to be built relatively easily to query failed transactions. Please fix this.