Chuck Grassley actually said...

Senator Grassley and I want to change that. We have a bipartisan bill to open up the Medicare database.

Yes. I want to bring up an issue that might be a little bit different.

You have defied the lawful and legitimate oversight responsibilities of the House of Representatives and of the Senate.

On what legal ground are you withholding that e-mail? The President cannot claim Executive privilege to withhold that e-mail.