According to a poll released Friday by the American Research Group, 54% of adults favor proceeding with impeachment proceedings against Cheney
In case you have any doubts about the basis for impeaching Cheney (!) please watch the following video clip from Robert Greenwald. It includes an excellent collection of Cheney's lies and deceit.
Crooks and Liars has more. You can also read about Rep. Dennis Kucinich's bill for impeachment (H.R. 333) at his site.