How does one deal with slander as a "professional?"
Where do you practice this "professional" skill?
The only one I know who was ever good at it was Clinton, except in his case it was not slander, and the news media went out of their way to cover it over.
I doubt Romney, Perry etc. would do much better. Gingrich certainly did not. Whatever candidate you want on the GOP side, this is what is coming from the left and the media to any and all of them, if they establish a lead and might beat the incumbent.