He ran for his Senate seat, specifically promising to help acquit Clinton if he won. Impartial, not.
Via NY Post:
Mr. President, this is a day of solemnity and awe. I rise humbled that we are participating in a process that was mapped out more than 200 years ago by the Founding Fathers and that the words we say today will be looked upon by historians and future Congresses for guidance. That is quite a responsibility.
I began this process in the House where it degenerated quickly into bitter acrimony. I would like to say to Majority Leader [Trent] Lott and Minority Leader [Tom] Daschle, and to my new colleagues who have wrestled with this case, that I deeply appreciate your fairness and patience and the way this has been handled with such dignity in the Senate.
Growing up, our country and its government seemed like a mighty oak — strong, rooted, permanent, and grand.
It has shaken me that we stand at the brink of removing a President — not because of a popular groundswell to remove him and not because of the magnitude of the wrongs he’s committed — but because conditions in late 20th century America has made it possible for a small group of people who hate Bill Clinton and hate his policies to very cleverly and very doggedly exploit the institutions of freedom that we hold dear and almost succeed in undoing him.
Most troubling to me are the conditions that allowed this to happen, than the small group who precipitated them.