From the State Department:

The United States is deeply disturbed by reports that Pakistani President
Musharraf has taken extra-constitutional actions and has imposed a state of
emergency. A state of emergency would be a sharp setback for Pakistani
democracy and takes Pakistan off the path toward civilian rule. President
Musharraf has stated repeatedly that he will step down as Chief of Army Staff
before re-taking the presidential oath of office and has promised to hold
elections by January 15th. We expect him to uphold these commitments and urge
him to do so immediately.
The United States stand with the people of Pakistan in supporting a democratic
process and in countering violent extremism. We urge all parties to work
together to complete the transition to democracy and civilian rule without
violence or delay.