In June of 2008, Dennis Kucinich the former Democratic presidential candidate and representative from Ohio introduced into the House of Representatives a resolution to impeach George Bush, the current US President. House Speaker Nancy Pelosi did not support the resolution, saying the resolution was unlikely to succeed and would be divisive.
Only two presidents have ever been impeached; Andrew Johnson in 1868 and Bill Clinton in 1999 but both were acquitted by the Senate. No Vice President has ever been impeached although during the Bush administration two resolutions to impeach Dick Cheney were introduced. Neither made it out of committee.
You can read the entire text of congressman Kucinich’s resolution to impeach George Bush here.