Frist Vs. Clarke

This Richard Clarke scandal is getting serious.
Senate Majority Leader Bill Frist is suggesting that Clarke may have lied to Congress under oath this week. Clarke also testified before the House and Senate intelligence committees two years ago, and Frist says he told two contradictory stories. Both under oath.
If it turns out that Clarke did lie under oath, he’s in some really deep shit. The media and the anti-war brigades who lionized a perjurer as a hero are going to feel pretty darned stupid. And deservedly so.
If it turns out that he didn’t lie under oath, if the GOP gets the records declassified only to find there’s no there there, Bill Frist just shot Republican Party credibility to hell. This would be beyond politics as usual, which is bad enough. Bogus accusations of criminal behavior are not so easily forgiven or forgotten.
(The fact that Clarke made contradictory statements while not under oath is a totally separate question.)
Here’s what I want to know. Does Frist already know what Clarke said in his previous testimony? In other words, is his accusation of criminal behavior a reasonable one? A sitting president was impeached for lying under oath. About sex. This is no idle charge Frist is making.
Or is this just a slimy speculation? If so, Frist is unfit for his job.
Think that’s an overstatement?
Here’s what Scott Spradling said to Howard Dean a few months back.

Governor Dean, you had once stated that you thought it was possible that the president of the United States had been forewarned about the 9/11 terrorist attacks. You later said that you didn’t really know.
A statement like that, don’t you see the possibility of some Democrats being nervous about statements like that leading them to the conclusion that you are not right for being the next commander in chief?

Inded. And the same principle will apply to Frist if it turns out that he’s just mouthing off.
Politics may be ethically corrupting to many, if not most, people who practice it. I can accept that. But there ought to be a higher standard for the Senate Majority Leader and the top counter-terrorism adviser. Their job is to protect my office tower from being hit with a truck bomb, not to slime their opponents for cheap political career points.