30 + 19 + 16 + 5 = 70
That is 30% Undecided. There have been four contests so far where undecideds have been 10% or higher. Cruz has done very well in all of them.
Louisiana with 10% Undecided +36% higher than he polled
Alabama with 10.3% Undecided +43% higher
Oklahoma with12.1% Undecided +69% higher
and Kansas with 24.5% Undecided +124% higher
The undecideds have been breaking to Cruz. (Caveat, in Virginia with 9.9% undecided, they broke for Rubio and Kasich)
In almost every state so far, the late-deciding voters almost entirely broke against Trump. So if someone voting tomorrow is still undecided, chances are high that it will NOT be a vote for Trump. It looks like if you are not already a Trump supporter, you won’t be on primary day.