In the US, politicians are judged by their ability to 'bring home the bacon'. And nothing says pork better than the US Army Corps of Engineers, whose civilian employees outnumber military people by 100 to one!
Now they want to upgrade a small portion of the Mississippi River, which is exactly like a highway to nowhere. The giant spending bill contains something for everybody, so it is well supported in the Pork-Dome, but Bush will veto it. Then they will have to throw in some more stuff to get enough support to override the veto!