Ken Sanders gives us all a challenge in his blog The Politics of Dissent.

It was Theodore Roosevelt, twenty-sixth President of the United States and a Republican, who famously said in 1918, "To announce that there must be no criticism of the president, or that we are to stand by the president, right or wrong, is not only unpatriotic and servile, but is morally treasonable to the American public."

…

Those who, in the name of nationalism disguised as patriotism, would remain silent when faced with the Bush administration’s common plan to wage war and torture captives in violation of customary and treaty-based international law; those who would waive their rights while they wave their flags; those who would turn a blind eye to evidence that the Bush administration manipulated intelligence to justify its preconceived war; they would do well to consider the oath of office taken by all members of the civil service or uniformed services. The oath is not to the President or any other person. Rather, those who take the oath swear to "support and defend the Constitution of the United States against all enemies, foreign and domestic."

I added emphasis to those last two words, because that is what so many Americans seem to have forgotten. Enemies don’t just come from overseas. An enemy of the Constitution happens to live in the White House… a powerful enemy who uses his job title to appoint other enemies of the Constitution to other prominent positions in our government… an enemy against whom our country must be defended.