I shouldn't get started on this, but Clinton was impeached because of the republicans' fanatical lust for power at any expense to our nation.
Clinton was impeached because a dirty and biased prosecutor, who failed to find any wrong doing on a bogus real estate case, happened upon a sexual impropriety.
Clinton was impeached because biased members of the Supreme Court erroneously ruled that a civil court case be allowed to proceed against a sitting president...rather then realizing the greater good for our nation is to have a President not tied up in civil court proceedings, but to grant a "stay," or delay, to this civil case until after the President fullfills his constitutionally elected duties.
If they can impeach Clinton for lying about a perfectly legal sexual impropriety, and they can threaten impeachment of Nixon for his coverup in the Watergate scandal, then Bush should be impeached 10 times over for his lying to the American public about taking our nation to war, his lying about the leaking of Plame, and his lying about his association with Abramoff, among many other lies...too numerous to mention here.