With the midterm election less than two months away, all signs point to a punishing defeat for Democrats in the House of Representatives.

Since July 1, there have been 111 polls released on U.S. House races in 79 districts. Some were commissioned by news organizations; others came from the campaigns themselves or political groups (a detailed list is posted at Rove.com). Ninety-seven polls were conducted in seats held by Democrats while 14 were in Republican districts.

They show that Democratic incumbents trail GOP challengers in 30 districts and are behind in seven of nine open Democratic seats. By comparison, GOP incumbents are ahead in seven of the eight contests polled and Republican hopefuls lead in four of the six races for GOP open seats. If Republicans prevailed in these fights, they would net 34 of the 39 seats they need to win the House.

It could get worse. Of the 36 polls in which Democratic incumbents led, Republican challengers were within three points in 12 contests and within five points in 18 others. By contrast, in the 55 polls in which the GOP leads, the Republican is ahead by more than five points in 36. And in all but two instances in which data are available, the Democrat incumbents are significantly better known than their GOP challengers. As these challengers become better known, they're likely to rise in the polls.

Karl Rove, is a former senior adviser and deputy chief of staff to President George W. Bush and a Fox News contributor. He is the author of "Courage and Consequence" (Threshold Editions, 2010). To continue reading his column in The Wall Street Journal, click here.

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Karl Rove joined Fox News Channel as a political contributor in February 2008. He also currently serves as a columnist for the Wall Street Journal. Mr. Rove helped organize the political-action committee American Crossroads. His latest book is "The Triumph of William McKinley: Why the Election of 1896 Still Matters" (Simon & Schuster, 2015). Follow him on Twitter @KarlRove.