Tonight could be the first really major knockout blow in both primaries.
We're finally getting into winner-take-all states with a huge ammount of delegates.
Normally this is done by Super Tuesday but on both sides it's been just close enough to keep this interesting.
Michigan and Florida are the big ones. They hold a lot of delegates. Trump leads in both as does Hillary.
For the Democrats those two states make up almost 350 delegates or 14% needed. For the GOP they make up 160 delegates almost 13%.