The Big Screen and the Little Screen

If you are following US politics, today is Super Tuesday #2.

The Democratic and Republican primaries are completing for Vermont, Rhode Island, Ohio, and Texas. It is do or die for Hillary. It is hope or change for the Barock Star. Oh, btw, it is the Republican nomination for McCain.

I am watching the big screen, following the Texas returns and commenting on the little screen.

But wait! Which screen is the big and which is the little?

I'm confused.