By Caitlin Yilek - 12/11/15 08:52 PM EST
After a week of tension between the two Republican presidential candidates, front-runner Donald TrumpDonald TrumpSchwarzenegger avoids questions on whether he'll support Trump Clinton's ace in the hole: Obama Rubio apologized to Trump for 'small hands' crack MORE took a shot at Sen. Ted CruzTed CruzMeet the billionaire donor behind Hulk Hogan’s lawsuit against Gawker Party chairs see reversal of fortune McConnell: Trump White House will have ‘constraints’ MORE (R-Texas) on Friday, saying that “oil companies pay him a lot of money.”
“With ethanol [Cruz has] gotta come a long way,” Trump said in Des Moines, Iowa. "He’s right now for the oil. But I understand if oil pays him a lot of money, he’s gotta be for oil. Right?”
"If Ted Cruz is against ethanol, how does he win in Iowa," Trump asked.
The billionaire businessman also slammed Cruz as a copycat.
“The one guy that is doing pretty good with me in Iowa is Ted Cruz,” Trump said. "Everything I say, he agrees with me. No matter what I say.”
He later seemed to take a shot at Cruz's background.
“I do like Ted Cruz, but not a lot of evangelicals come out of Cuba,” Trump said. “But I like him nonetheless.”
“[Ted Cruz] should not make statements behind closed doors to his bosses, he should bring them out in the open,” Trump wrote on Twitter. “More fun that way!”