Clinton made two mistakes in the Lewinski case:
First one was in not keeping his pants zipped in the first place, but we all know that.
The second one was in not looking his questioners in the face when asked about it and saying, "That is none of your damn business. Next question."
The president of the US made an error in judgment, which precipitated a scandal, just as it should. Bad judgment on the part of the president is not something to be taken lightly. When Nixon made the bad judgment of trying to protect his supporters who were guilty of burglary, he was impeached and lost his presidency, after all.
Still, neither Lewinski nor Watergate was the major scandal of the 20th. century. Neither one jeopardized the Constitution or involved treason. That one has to have been the incident in which arms were sold to an enemy of the United States and the proceeds used to subvert the will of Congress. That one did jeopardize the Constitution, and did involve treason, and deserves the title of "worst scandal of the 20th. century."
Can't we just turn Congress off and then turn it back on again?