There is one thing the US can say regarding Egypt. It can threaten to remove its support for the current regime, or it can say nothing. If it was up to the US, Mubarak would never be leaving. The US has no more power to save Suleiman than it has to save Mubarak. It is not up the the US. The US can pressure Mubarak out, but it cannot keep Suleiman in.
The question is under what conditions would the people in the square accept Suleiman. I'm not sure, but they are clearly different from the conditions Hillary Clinton would want to impose.
Mrs. Clinton highlighted the dangers of holding elections without adequate preparation. To take part in Egypt’s new order, she said, political parties should renounce violence as a tool of coercion, pledge to respect the rights of minorities, and show tolerance. The White House has signaled that it is open to a dialogue with the Muslim Brotherhood, an Islamist group that Israeli officials and others warn could put Egypt on a path to extremism.It doesn't seem like Suleiman's NDP could take part in Egypt's new order, by Clinton's rules.
But she and her country are totally irrelevant in this situation, and more irrelevant because the US never sided with the protesters even after it was clear the protesters had won.