Python API wrappers for TransparencyData.com and InfluenceExplorer.com data. Both APIs provide a variety of political influence data. Influence Explorer provides easy to use summary information for politicians, organizations, industries and prominent individuals. Transparency Data provides extensive search capabilities over raw transactional records. It is useful for retrieving data sets for your own analysis.
Both sites currently include data on campaign finance (federal- and state-level), federal lobbying, earmarks, and federal grants and contracts. More data sets will be added over time.