Millions of Americans have been scrambling to finalize their men’s and women’s college basketball brackets ahead of the tip-offs of a weeks-long sporting spectacle that will see people wager billions of dollars.

Former President Barack Obama picked Tennessee basketball to make the Final Four of March Madness in his bracket. Here's more:

Here's who our team of writers covering the games in Cleveland this weekend think will survive the early rounds, get through next week's regional play and reach the Final Four, April 5 and 7, in San Antonio. And to reflect the somewhat open feel of this tournament, our four writers picks four different national champs.