If Cruz goes after Trump it’s self-destruct. Either Trump will take him down, Cruz will damage Trump, or both will sink in the polls per the MSM goal.
It can’t end well. Trump and Cruz have shown a united front against the establishment, against the media. That front earns them both respect for standing together against the cabal. If Cruz turns on Trump, that all goes out the window.
Can’t end well.
I might remind you that this is a contested primary election.
At some point, Trump and Cruz will need to contest each other.
I might also say that (based on numerous assertions here) Ted Cruz is not running for VP.
May the best man win...