Yup, Bill Clinton was impeached. For, um, lying about, um, sex with an intern.
Who impeached him? The House of Representatives. Controlled by ... Republicans.
George Bush has not been impeached for his lies about Iraq. Because the House of Representatives is controlled by ... Republicans.
If Al Gore had been president and had told the same lies, he would have been impeached too. If the Democrats controlled the House, they would have impeached Bush. What he has done is absolutely impeachable. Worse than Watergate, as John Dean put it.
I'll get into details of Bush's history of incompetence & corruption sometime later, when I have a block of free time to work on it. (I'm not sure if that's a promise or a threat.

BTW, Iceman, I completely agree: neither party has done much to impress me in recent years/decades. I consider myself a Democrat mostly because, again, their principles and their sense of the most important things in this country's history make sense to me. But I do admire people like John McCain or Alan Simpson or Chuck Hagel or Lindsay Graham more than a lot of Democratic politicians. In retrospect, I have a lot of respect for the first George Bush (George W.'s daddy), too. George W. himself, not so much.