It certainly wasn't Cruz' finest hour. Trump proved that Cruz did not have the mental toughness to run for President. He has a "glass jaw". First came the rumors of cheating on his wife, which were hurtful enough, but then came the nonsense that Cruz' father took part in the JFK Assassination. Cruz was so blinded by rage, he was incoherent.
It also proved there was no place that was too low for Donald Trump to go during a campaign. Which was a good thing because that was needed when campaigning against Hillary Clinton.
I also think the headline for this story is misleading at best. Cruz didn't say he invited Trump to campaign for him. It would imply that Cruz needs his help to win the Senate race in Texas, which is what the lib reporter wants us to think.
Cruz said he invited Trump to "come to Texas" because he can help GOP candidates all up and down the ballot. Cruz will beat Open Borders Beto hands down. Only the Left has this fantasy with weighted polls that O'Roarke gets anywhere near Cruz in November.
Cruz wins easily without Trump's help but he's not going to stand in the way if Trump wants to help out other Republicans in various Texas races.
Mess with the bull ya get the horns. Cruz simply didn't seem to have the political perception to figure it out.