Fox News anchor Bill O’Reilly erupted on the air with fierce anger Tuesday night, calling his network colleague Alan Colmes a liar during a heated discussion over alleged budget cuts by Barack Obama.

“Bull—-! You are lying! You are lying!” a fist-pounding O’Reilly screamed at Colmes, who’s a left-leaning political analyst for Fox News.

“Don’t call me a liar,” Colmes responded. “Don’t you sit there and call me a liar.”

The intense battle took place on “The O’Reilly Factor,” the top-rated news-analysis program in all of cable television.

O’Reilly launched into a tirade on Colmes for failing to specify any program President Obama would be willing to cut, other than entitlement programs such Medicare, Medicaid and Social Security.

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