This means that if you don't have cable or CNBC isn't included in your cable package, not only will you be unable to watch it live on TV, you also won't be able to stream it on your computer or other devices. To stream the debate on anything, you'll have to log in with a cable subscription that includes CNBC.
Now, there are a number of knockoff mirror sites out there, like Hulkusc that will mirror live broadcasts. But, as with any illegal redirect or mirror, you're likely to encounter a boatload of pop-up ads and dialog boxes that will annoy the living hell out of you, and potentially harm your computer.
So, if you lack the necessary subscription, but don't want to experience debate FOMO, well, you should figure out who among your friends and family have cable and go from there. CNBC will also have a live blog on its website throughout the night, and of course, you can always follow the seemingly endless stream of tweets from political journalists on Twitter. Either way, there will be plenty more debates to watch before the 2016 elections. Probably too many.