The Pacific Legal Foundation's Tim Sandefur offers a nice reminder that libertarians and conservatives aren't the only ones who have good reason to worry about the Supreme Court's ridiculously broad interpretation of congressional power under the Commerce Clause:
Again, this can't be emphasized enough: liberals have every bit as much reason as conservatives to worry about the expansive interpretation of the commerce clause. For example, it was by exploiting that interpretation that conservatives adopted nationwide restrictions on certain types of abortion that liberals believe should be protected from government interference. The Constitution is intended to shield us from the government, and if we lower that shield because "our guy" is in the White House, you'll be left without protection when "their guy" gets the White House the next time around. As James Madison said in The Federalist, "Enlightened statesmen will not always be at the helm. Nor, in many cases, can [the public interest be pursued] without taking into view indirect and remote considerations which will rarely prevail over the immediate interest which one party may find in disregarding the rights of another or the good of the whole."