Since I was following this pretty closely, one of the interesting things that happened is that Frist first tried to do this with a defense authorization bill. His fellow republicans slammed him (and others) for this because they wanted to pass the bill "clean". He pulled the port safety stuff at the last minute (though probably he was planning it all along) and didn't get the pushback- the port safety bill wasn't nearly as important to pass "clean" as the defense authorization bill.