Whether that's what he was doing or not, I'll say this: Have you seen ANY politician who does not deflect and redirect? They all do that. Including Trump.
Here's an example of Ducking Donald dodging and deflecting and pointing to Cruz, when Trump was asked repeatedly about his views on late-term abortion:
If he wanted to end the issue, he should have looked the reporter in the eye (or the camera) and said, I NEVER have and NEVER would cheat on my wife. End of issue, end of story.
He's a Harvard trained lawyer...that is how he would have or should have advised any client to respond to such an allegation.