weakest point this law never been used to prosecute set of facts at any time in 25 year history. >> bottom line here, prosecutors have to prove definitively the money used to cover up the affair came from campaign contributions. if they can't do that it's merely a gift. and they are left with a wealthy man using the cash from taught dry affair. tasteless yes but illegal? >> shepard: under fire on capitol hill today after operation fast and furious. you will remember that the federal program that ended up letting hundreds of guns end up in mexico. officials say they were hoping to track the records back to the drug cartels who were buying them. investigators say two of those guns turned up at the scene of the killing of a u.s. border patrol agent named brian terry. that was arizona last year. and that led to this hearing today. >> how is it that you can make the claim that the border is now more secure than ever and, yet,