From the site itself (note this is the msot recent article, however):

So the Clinton/Gore White House says no to a fair and free debate without providing an adequate rationale or even a reason other than an unspoken political calculus. In the case of this proposed commission, Clinton/Gore even had political cover from conservative Republicans, much of the foreign policy establishment, and sky-high approval ratings. All they needed to stand up to were a few loud voices in the Cuban-American community. They didn't and that community has proudly circulated media reports that prove its continuing raw political clout in Washington.

The unilateral lifting of the embargo would deprive Castro of his last stick for beating the "U.S. imperialists." The tragedy is that Cuban-Americans can't see the cruelest blow of all to Fidel would be depriving him of his U.S. enemy and scapegoat. Without that his whole life loses meaning.

For a few days reports from Washington had hinted that Clinton/Gore might use this issue to restore national priorities, but the reports didn't pan out. So the first U.S. presidential campaign of the new millenium began this month and probable Democrat candidate Gore demonstrated just how well he has learned White House lessons about putting personal interests and politics-as-usual over integrity and national interests

I was going to ask why the President is reluctant to form the commission but this answers that question. I think the commision would recommend a more fair stance. I wonder what GWB (Bush Jr.'s) stance on the actual commission is - thne again if he has placed Cuba on the "axis of evil"...