In his new web ad, Dwayne Stovall, a Republican candidate for U.S. Senate, has a conversation with his dog and compares U.S. Senate Minority Leader Mitch McConnell to a turtle.

Stovall is one of seven Republicans hoping to unseat U.S. Sen. John Cornyn in the Republican primary. He and U.S. Rep. Steve Stockman have been drawing the strongest interest from Tea Party groups intent on replacing Cornyn.

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Aman Batheja was a political reporter and editor for the Tribune from 2012 to 2019. Previously he worked for eight years at the Fort Worth Star-Telegram, most of that time covering state and local politics....