Mr Cruz’s departure from the campaign

"Mr Cruz’s departure from the campaign is unlikely to be the end of his political career. The junior senator, a hardline conservative who advocates deep tax cuts skewed towards the rich, the loosening of environmental rules and business regulations, the repeal of Barack Obama’s health-care law and an increasingly fierce anti-immigrant rhetoric, is only 45 years old. In his speech on May 3rd he seemed to be leaving the door open to a comeback in some future year. 'Our movement will continue, and I give you my word that I will continue this fight with all of my strength and all of my ability,' he said."
The Economist

I think that he is fighting for unreasonable weird causes

I saw a slide that describes "a White supremacist Super PAC", which endorses Donald Trump. "Don't Vote For A Cuban, Vote Trump" is the message from the Super PAC. Do you think that Mr Cruz's departure from the campaign is related to this sort of anti-Cruz and pro-Trump activity, which refers to his racial identity? Did the fact that his father comes from Cuba put him at a disadvantage in his campaign, even though he reportedly speaks with a fierce "anti-immigrant rhetoric"?

BBC News - Trump links Cruz's father to Kennedy assassination
"In an interview with the Miami Herald, Gus Russo, an expert on the Kennedy assassination, was sceptical of the Enquirer's claims."
"The National Enquirer previously published a report claiming that Ted Cruz had several extra-marital affairs. The tabloid provided no evidence."