The US on Thursday said the bid by Pakistan's coalition to impeach President Pervez Musharraf, a close ally of Washington, was "Pakistan's internal affair".
"We have consistently said the internal politics of Pakistan is an issue for the Pakistani people to decide," State Department spokesman Gonzago Gallegos told reporters.
"Our expectation is that any action will be consistent with the rule of law and the Pakistani constitution," Gallegos said.
Pakistan's coalition announced earlier in the day to impeach Musharraf immediately because of his poor economic policies that had led to an economic impasse during his rule in the past years.
Musharraf, who had so far been an all-powerful kingmaker in Pakistan, has also been criticised for his policies that have weakened the federation and democratic process.
Musharraf denied the charges, and warned that the impeachment could destabilise the country.
The Bush administration attaches great importance to its cooperation with Pakistan in the anti-terrorism war.
In May, White House spokeswoman Dana Perino had said US President George W Bush expected Musharraf to continue his role in further strengthening US-Pakistani relations.