When fellow Senators were not backing Cruz it was because he would make a bad POTUS, because he wont work with them like Trump will, so support Trump instead
But now that Cruz got lots of endorsements, OH that's real bad too, he is in their pocket, so support Trump instead.
Trump's rules : Bad if heads, bad if tails, Trump always wins, Cruz always loses
The hypocrisy is truly something else. The arguments shift like grains of sand in the wind.