Overview of PAC Influence on US Congress Representation
Correlation Between House of Representative and Donation Percentages: 0.692
Correlation Between Senate and Donation Percentages: 0.528
From the plots, it seems that the party representation in Congress almost parallels the trend of foreign-connected PAC donations.
In fact, looking closely, the trend of donations seem the predict the representation as the changes in donations happen earlier than the changes in representation.
Additionally, it seems that Republicans usually receive more PAC donations than Democrats, but the percentage of donations of the Democrats seem to be growing closer to that of Republicans in recent years.