Trump tweets 9/11 photo to Cruz
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Republican presidential front-runner Donald TrumpDonald John TrumpIvanka Trump pens op-ed on kindergartners learning tech Bharara, Yates tamp down expectations Mueller will bring criminal charges Overnight Cybersecurity: Equifax security employee left after breach | Lawmakers float bill to reform warrantless surveillance | Intel leaders keeping collusion probe open MORE on Saturday brought his Twitter attacks against Texas Sen. Ted CruzRafael (Ted) Edward CruzWhatever you think the Alabama special election means, you’re probably wrong This week: Congress gets ball rolling on tax reform Week ahead: Senators work toward deal to fix ObamaCare markets MORE to a new level. 

The billionaire real estate tycoon tweeted an image of the World Trade Center in the aftermath of the Sept. 11, 2001, terrorist attacks. 

"Is this the New York that Ted Cruz is taking about & demeaning?" Trump tweeted.

  

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On Tuesday, Cruz slammed Trump for embodying "New York values."

Trump pushed back at Thursday's Republican debate, calling the statement "very insulting."  

Trump has been targeting Cruz with attacks in the days since the debate, calling him a "hypocrite" for his undisclosed bank loans and taunting him over a lawsuit about his citizenship.

He barraged Cruz with Twitter attacks throughout the day Saturday.