I'm thinking it's because he had multiple female left-wing nutcases screaming at him from every direction. Valerie Jarrett, Loretta Lynch, Hillary Clinton, and Michelle Obama, were probably on his case so much he just lost it completely and started just doing random things, including giving weird press conferences.
I think he brought it up so he could clear her of it. And to Show her she owes him something for helping to clear her.He isn’t the sharpest tool in shed.