I wouldn't call what Delay has done, unscrupulous. Congress is saying, "so you say she's a veggie, well bring her down here in a produce basket so we can see for ourselves."
I wouldn't either, but some others were complaining about the precedent this will set if we let Congress interfere in this fashion.
I know the DOI isn't the Constitution, but if the government does not exist to protect people's inalienable rights to life, liberty, and the pursuit of happiness, what is it for?