US Secretary of State Hillary Rodham Clinton on Thursday criticized the Bush administration for what she called a failed eight-year effort to isolate Iran that has only increased worries about Iranian influence. In congressional testimony, she described the Bush approach as one of attempting total isolation of the Iranian government. She said in a rising voice Thursday that the Bush policy did not deter Iran "one bit" in its ambitions to acquire nuclear weapons and to support terror organizations like Hizbullah and Hamas. She said the nuclear program has continue unabated. The Obama administration is trying a different approach by offering to engage in dialogue with the Iranians.