So Congress and the Administration are gearing up for a good old fashion Constitutional powers fights. Congress want to get administration officials, namely dark master Karl Rove, and Harriet Miers, master of ... not becoming a Supreme Court Justice, to testify on the Hill in an effort to get to bottom of the fired federal prosecutors mess.
The Administration made a laughable offer in which:
"Such interviews would be private and conducted without the need for an oath, transcript, subsequent testimony, or the subsequent issuance of subpoenas."
In other words, Rove will speak to Congress only if he can lie his ass off. Seeing as administration officials have already lied to Congress on this very matter, the Democrats are going to go with a subpoenas, rather than take this deal.
The Administration is going to challenge the subpoenas, and everyone goes to court.
Because the Nixon metaphor isn't complete without a fight over executive privilege.