The Congress has, for example, turned over control of the wealth of the nation to a cabal of private bankers collectively known as the Federal Reserve. Since 1913 this group has caused the Great Depression and has been directly linked to our current economic turmoil.
Does Congress have the right to order you to purchase health insurance? The Ninth Amendment to the Constitution should destroy that myth.
This is an attempt by a non-lawyer to make sense of it all, but I have dug down into some of the Supreme Court cases and evaluated them next to the Constitution.