No, let's see how he does on Super Tuesday. If on that day Trump repeats his ten point margin of victory in South Carolina across other states in the South, then sure, we can declare Cruz's candidacy dead.
Cruz would need to overperform in NV and hope to get second place there to have a decent Super Tuesday. He would need to win at least 7 states on Super Tuesday: AK, TX, WY, MN, CO, OK and TN or VA, in order to stay strong. Should he get third in NV, he still needs to get at least 4 or 5 states to have a good ST and hope that Rubio and Kasich can win in MA, VA, VT to weaken Trump.
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