Sen. Frist on the hot seat

HCA subpoenaed over Sen. Frist's shares: "A federal investigation into Senate Majority Leader Bill Frist's sale of HCA Inc. stock widened on Friday when the largest U.S. hospital chain said federal prosecutors had subpoenaed the company for related documents.

Frist, a Tennessee Republican and a potential 2008 presidential candidate, has come under fire for sale of his stock in the company shortly before HCA warned that earnings would miss expectations.

The sale has also drawn the attention of the Securities and Exchange Commission, which has sought information from Frist. His spokesman has denied Frist had any inside information when he initiated the sale."

This could be interesting.