Charles Krauthammer was on “The Kelly File” tonight to discuss tomorrow’s midterm election.

“This is a referendum on Obama’s hyper-liberalism,” he said. “This is liberalism on trial.”

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Krauthammer also noted that Republicans have run a pretty gaffe-free campaign this year.

While Megyn Kelly said we may not have the election’s outcome until December or January, Krauthammer predicted we’ll know by midnight Wednesday.

Krauthammer will be on hand tomorrow for special election coverage, hosted by Kelly and Bret Baier, starting tomorrow at 6p ET on Fox News Channel.