It's going to take Stovall, Stockman, Vega, and all of the others running to keep Cornyn under 50% and force him into a run-off. Cornyn loses if he goes to a run-off election.
That's exactly how Cruz beat Dewhurst.
/johnny
Yes, good points, but not every state has that kind of a runoff system for the primaries. Look at the country as a whole and not just what’s happening in Texas.