Story highlights Rep. Marsha Blackburn is circulating a letter seeking investigations of the Clinton Foundation

Blackburn is asking fellow House Republicans to sign the letter

(CNN) House Republicans are circulating a letter that urges several federal agencies to investigate the Clinton family's charitable foundation.

The letter, authored by Rep. Marsha Blackburn, R-Tennessee, casts the foundation as "a lawless 'Pay to Play' enterprise that has been operating under a cloak of philanthropy for years and should be investigated."

Blackburn addresses the letter to FBI Director James Comey, IRS Director John Koskinen and Federal Trade Commission Chairwoman Edith Ramirez. Her office plans to send it Friday. Its circulation was first reported by The Daily Caller

In the letter, Blackburn and her co-signatories argue that "the Foundation's activities cannot be ignored."

They point to the foundation's international work, which wasn't cited in the paperwork filed at its 1997 inception.

Read More