Republican presidential candidate Donald Trump is once again attacking a journalist for writing a critical blog post about him, but this time he's hitting a conservative reporter.

Tuesday on Twitter, Trump called Washington Post blogger Jennifer Rubin a "real dummy" and suggested she had a "low I.Q." after Rubin had questioned on her blog whether Trump is "too chicken" to appear in the next GOP presidential debate.

"Highly untalented Washington Post blogger Jennifer Rubin a real dummy, never writes fairly about me," Trump said. "Why does Wash Post have low IQ people?"

In another tweet, Trump said, "You would think a paper like the Washington Post would be fair and objective. For the record, almost all polls showed I won all debates."

Rubin did not respond to a request for comment from the Washington Examiner media desk, though she did send a tweet toward Trump that said, "Hooray! I join esteemed company."

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