NEW YORK (AP) -- Donald Trump resumed his attacks on Fox News Channel's Megyn Kelly after her first show back following a vacation, tweeting that he liked her show better when she was away.

Donald Trump (L) and Megyn Kelly
Donald Trump (L) and Megyn Kelly (Chip Somodevilla/Getty Images, Craig Barritt/Getty Images for Cosmopolitan Magazine and WME Live)
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The Republican presidential front-runner-turned-TV-critic said that Kelly "must have had a terrible vacation" because "she's really off her game." He also retweeted a message that referred to her as a "bimbo."

Trump has been attacking Kelly ever since her tough questioning of him during the first GOP presidential debate, seen by 24 million people on Fox on Aug. 6. A day after the debate, he said that Kelly had "blood coming out of her eyes, blood coming out of her wherever."

It led to a private, clear-the-air conversation between Trump and Fox News Chairman Roger Ailes, which hasn't resulted in peace.

Trump repeated his contention that Kelly, host of a prime-time Fox show and one of the network's biggest stars, was sent on an unplanned vacation. Monday night was her first show back after being away. Fox said her time off had been scheduled long before the debate. Trump also tweeted that Kelly was afraid to confront a guest, Dr. Cornel West, and that she had "no clue" on immigration.

Fox had no immediate response. Brian Kilmeade, a host on the morning show "Fox & Friends," said Tuesday that Trump was "out of control" and his comments unwarranted.

"That actually bothers me personally," Kilmeade said. "And we are all friends with Donald Trump, but he is totally out of bounds reigniting that fight. I don't know if he's trying to get ratings out of that or poll numbers, but he's not going to be successful."

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