One the one hand, dude, the entire country heard you on tape not only talking about doing the very thing you're now being accused of, but bragging about it. That tends to complicate the standard denial.
On the other hand, it is awfully curious that these accusations never came out until mere days after the tapes laid the groundwork for them, is it not? Where were these women before? Or was the timing of everything orchestrated by everyone involved - including NBC and the New York Times - to maximize damage to Trump?
First we'll release the tapes so everyone will be convinced he behaves like this, then we'll bring for the specific accusers. No one will believe his denials. Result: President Hillary.