Super Tuesday

Super Tuesday has come and gone, I meant to blog about it in a more timely fashion, but there you go.
The primary elections start in a dribble, but Super Tuesday (1st March in 2016, but it varies) is a day that decides some candidates futures. A huge group of states all hold their elections on the same day. I think in fact, more delegates are up for grabs than on any other day. The date changes, and the states participating changes. This year, Alabama, Arkansas, Colorado (caucus), Georgia, Massachusetts, Minnesota (caucus), Oklahoma, Tennessee, Texas, Vermon and Virginia participated. Additionally, Republican caucuses in Alaska, North Dakota and Wyoming were held. The terrirory of American Samoa had a Democratic caucus. I presume these last states will have caucuses or something for the other party some other time.
At the end of the day, Hillary Clinton won 7 states and 486 delegates. Bernie Sanders won 4 states and 321 delegates - enough to make him declare he is staying in the race.
In the Republicans - Donald Trump won 7 states and 256 delegates, Ted Cruz won 3 states and 219 candidates, and Marco Rubio won 1 state and 101 delegates. Although they didn't win any states, John Kasich won 21 delegates and Ben Carson won 3 delegates. I don't know how that works. Maybe you can win counties within states or something. It might have something to do with whether the state has a 'winner takes all' approach to delegate votes, or not?
Which puts the leaders of the race on either side (Clinton, Trump) about half way to the amount of delegates they need to get through to the presidential vote.