The Foundation for Accountability and Civic Trust (FACT) filed a complaint with the Senate ethics subcommittee over Sen. Cory Booker, D-N.J., asserting that he was fundraising off his marathon floor speech last week, which the watchdog says is a violation of the chamber's ethics rules.

In a letter dated Tuesday to the Senate Select Committee on Ethics, chaired by Sen. James Lankford, R-Okla., FACT said several solicitations were sent before, during and after Booker's speech that directly linked "official actions with solicitations for campaign contributions."

The ethics rules draw a clear line between official government business and campaign activity, and it is important these rules are enforced to prevent Congress from simply becoming a venue for campaigning," FACT wrote in their announcement.