Nothing more. It probably doesn't mean anything. But one major candidate's advertising seems to have ground to a halt. All weekend, this candidate didn't have a single TV, radio or newspaper advertisement.
It's as if he (oops - or she, but she's not the one I've been keeping tabs on, but we'll say "she" just to be fair to him) well - appears as if they either ran out of money, or they're waiting for the very end for an advertising blitz, or maybe (and this is purely speculative) they stopped advertising because they're going to make a major announcement in the next few days.
Or at least that's how one might see it - if one were to believe this warped thinking. Me? I'm too busy to worry about such things.
Just forget I brought it up.