I think any investigation will be stymied. With a Democrat in the White House and Democrats controlling the Senate, this will all be swept under the rug.
They will try right to Nov. 2012, but a smart candidate for office will hammer the issue and make the stalling and corruption a big part of his run for office, on top of the crimes themselves.
“Elect me and I promise to prosecutor anyone involved.”
Then once elected, do it.