BILL HEMMER (CO-ANCHOR): So you're making a case that it's the credibility of each person that will ultimately decide this. So once you start to hear them out, the American people, the senators, Republican, Democrats, decide. ARI FLEISCHER (FOX NEWS CONTRIBUTOR): Clearly. Put yourself in a senator's shoes, and you have two people with diametrically opposing arguments standing before you, one says it happened, one says it didn't.