I hope this isn't going to be a trend for the coming decades. If the out of power party doesn't like the in power party, all they have to do is find some offense like a married man having an affair with a woman or some other excuse and use that to impeach the president of the usa because he belongs to the wrong party. Or even if they try to disprove a president's citizenship to no avail a la the Birthers.
I guess the Republicans haven't forgotten Nixon. In my mind, only presidents who are found guilty of serious crimes like breaking into a hotel should be impeached.
As far as I'm concerned, Clinton's behavior was grounds for divorce but not impeachment.