While all of the SEC primaries are proportional many of them have a reasonably high threshold:
- Alabama Primary (50 total delegates/47 bound) — Proportional with 20% threshold
- Alaska Caucuses (28/25) — Proportional with 13% threshold
- Arkansas Primary (40/37) — Proportional with 15% threshold
- Georgia Primary (76) — Proportional with 20% threshold
- Oklahoma Primary (43/40) — Proportional with 15% threshold
- Tennessee Primary (58/55) — Proportional with 20% threshold
- Texas Primary (155/152) — Proportional with 20% threshold
- Vermont Primary (16/13) — Proportional with 20% threshold
Looking at national polling only Trump beats the 20% and only Cruz beats 13%.
Hmm…
So if many of the establishment candidates stay in until after March 1st Trump and Cruz could start off with a boatload of delegates.