[ksen]

Then blame Congress for the failure to enforce their subpoena.

It is the Executive branch's job to enforce.

The legislature can only pass things, the judicial branch can only render judgments, it is the executive that makes sure it happens.

[malakhi]

It is the Executive branch's job to enforce. The legislature can only pass things, the judicial branch can only render judgments, it is the executive that makes sure it happens.

Has Congress requested that this be done?

Didn't think so.