Says presidential boycott of the opening ceremony should be "firmly on the table," but no decision should be made now.
Would support the move "if the Chinese do not take steps to help stop the genocide in Darfur and to respect the dignity, security, and human rights of the Tibetan people." Read full statement.
Earlier: Clinton and two other Senators call for Bush to skip the event in Beijing.
Clinton also commends British PM Brown's decision to skip the ceremony.
Calls come as Olympic Torch draws crowds of protesters in San Francisco.
