It is not clear that Tuesday's mega election event will bring clear primary winners but certainly it'll bring a lot of excitement to the US Presidential campaign.
Most pundits are predicting a McCain win for the Republicans but many won't pick a winner in the Clinton Obama race, which polls indicate may be tightening over this last week. Obama took in a spectacular 30+ million dollars in January. Only McCain appears somewhat strapped for cash as we head into the time when candidates are spending millions every day to spread their word to a national audience. I'm guessing Romney will have a superbowl ad and perhaps others as well, though even massive TV time seems unlikely to have a huge impact this late in the game. That said, many voters make up their mind in the last days or even minutes of the election. In that case it would not hurt to have made a positive impact on Sunday.