Trump should attempt to negotiate with Cruz to get him to stop his ugly attacks and to accept a supreme court position. This will pacify the last 10 or 15 percent of the Glenn Beck audience.
As for whether or not it works: depends on Cruz's greed and whether he begins to believe his future is with Trump or if it's with the Establishment. All data points so far suggest Cruz will go with the establishment.
However, as Cruz continues his vicious attacks on Trump, he runs the risk of alienating his own support base. Just as we've seen this forum go from evenly divided between Trump and Cruz to almost entirely all for Trump, the whole country will turn into that, provided Cruz keeps opening his mouth and is noticed.
President can only nominate SC candidates.
How many of Cruz’s fellow senators would vote for him, do you suppose?
I agree that trading will have to take place. Scotus is too risky a trade. There’s no guarantee that the Senate will be republican even if trump wins. And if there’s a Republican senate, it is even possible they won’t approve cruz. The only appointment directly in the hands of the potus is the veep slot. After that comes Cabinet positions.