Campaign Finance In the Senate today, supporters of campaign finance reform narrowly defeated a measure that would have effectively killed the McCain-Feingold campaign finance reform bill. But reform advocates are still unsure that they'll overcome a Republican filibuster against the overall bill. The measure aims to ban unregulated donations to national political parties. Those funds are unregulated because the law assumes they will be used for party-building, but in recent elections they've been used to promote particular candidates. NPR's Peter Kenyon reports.