Cook Political Report: an independent, online newsletter that analyzes elections and campaigns for the US House of Representatives, US Senate, Governors and President as well as American political trends.
Politico Pro: a comprehensive database providing legislative and regulatory insights, data tools, and resources for policy research. You can find news by category or do a keyword search.
Factiva: aggregates news from thousands of national and local newspapers, magazines, trade publications and transcripts. Select 'all subjects' and choose Political/General news. Add your keywords.