Sen. Barack Obama, D-Ill., Sen. Sam Brownback, R-Kan., and Rep. Ron Paul, R-Texas, have signed the Oath of Presidential Transparency. Strangely, the trio is alone among White House aspirants in doing so. Here’s the oath they signed:

“I, __________________________, candidate for President of the United States, pledge to the American Public that, if elected President of the United States, my administration will be fully and robustly committed to open, transparent, and accountable government principles.