I recently attempted to create a data visualization based on the data available at usaspending.gov here: https://www.usaspending.gov/DownloadCenter/Pages/dataarchives.aspx
The data is available in .csv and .tsv formats, but I preferred a relational database to easily query and investigate the data.
I have requested that they make the data available in a relational format for ease of use, however I am not sure if or when that will happen.
In the meantime, I will provide my relational database to anyone who requests it. Just comment below, or email me.