CLEVELAND — Even Ted CruzRafael (Ted) Edward CruzO'Rourke prepping run for governor in Texas: report Support for Abbott plunging in Texas: poll White House debates vaccines for air travel MORE's good friends say they have no idea whether the Texas Senator will endorse Donald TrumpDonald TrumpCapitol fencing starts coming down after 'Justice for J6' rally Netanyahu suggests Biden fell asleep in meeting with Israeli PM Aides try to keep Biden away from unscripted events or long interviews, book claims MORE during his prime-time speech at the Republican National Convention Wednesday night.
"Ted is keeping his own counsel," said conservative activist Brent Bozell, a top Cruz ally, in an interview with The Hill on Monday.
"Beyond his wife, his closest confidant, I don't know that anybody knows what he's thinking."
Bozell said he spoke Monday morning to a top Cruz adviser, "and even he said, 'I don't know what he's thinking.'"
Bozell, the founder and president of the Media Research Center, hosted Cruz and a group of conservative leaders at his Virginia home recently for a dinner to map out Cruz's political future.
The Trump endorsement has been a particularly difficult decision for Cruz, Bozell said, given the personal attacks that Trump waged on Cruz during their fight for the Republican nomination.
"You have got to remember the personal side. ... If your wife was insulted, your dad tied to the murder of [President John F. Kennedy]. ... That's a tough one; a very tough one."
The Hill contacted Cruz's spokeswoman for comment.
Bozell said he and many other Cruz allies would be closely watching Trump, who is expected to be formally nominated for president in the coming days, this week in hopes of seeing a change in style as much as in substance. They want to see a more humble, conciliatory and presidential Trump, he said.
"Trump needs the Cruz people to be enthusiastic," Bozell said. "There are substantial numbers of Cruz people, I would venture to say the majority, that want to become enthusiastic [about Trump]."
"I think ultimately they will," Bozell added, though admitting that he himself has yet to endorse Trump.
"If Ted doesn't endorse Trump it will be big news and bad news for Trump," Bozell said.
"Ted's speech is hugely important.”