Go to 01:23 to hear Nixon say he first learned about the break-in from news reports.
Nixon went on in this speech to talk about resignations he has asked for and how those guilty must be held to account. He says he bears responsibility for the actions of the guilty and will insure that they are brought to justice. It was later learned that while he had nothing to do with the break-in, he helped cover it up.
Personally, I think Nixon was a more effective President than Obama. Obama is much more Jimmy Carter.