Trump attacks Megyn Kelly again: 'When people treat me unfairly, I don't let them forget'
Donald Trump takes questions at a press conference in Dubuque, Iowa on Aug. 25, 2015. [CNN]

Republican presidential candidate Donald Trump refused to apologize for taunting Fox News' Megyn Kelly on Tuesday, while complaining that her network mistreated him.

"When people treat me unfairly, I don't let them forget," Trump said during a press conference in Dubuque, Iowa. "Maybe we should have more of that in this country. And maybe the country wouldn't be pushed around so much."

Trump insulted Kelly online on Monday night as she returned to her hosting duties on the Kelly File, in his latest attack that he claimed stemmed from unfair questions she directed at him during a GOP candidate debate earlier this month.

"I think they give me very bad treatment. I think Fox treats me terribly," Trump said. "And a lot of the people that like me think they treat me terribly. What, you think I was asked nice, easy questions? The other guys, they're saying, 'What are you gonna do about jobs?' Another one saying, 'Do you love God?' I get these questions like, 'What's going on here?' And yet I won in every single poll of the debate. I won."

Trump, who appeared on Bill O'Reilly's O'Reilly factor on Monday, complained that the conservative network was covering him "terribly" despite his lead over the rest of the Republican field.

"Maybe it matters, maybe it doesn't," he said. "I don't think I get good treatment from Fox. They certainly cover me a lot."