CD27: Texas Water Development Board chair Bech Bruun resigned, and he is expected to challenge U.S. Rep. Blake Farenthold (R-Corpus Christi) in the Republican primary. Meanwhile, Port O’Connor boat sales and service business owner Chris Mapp filed in the Republican primary. Mapp unsuccessfully challenged U.S. Sen. John Cornyn (R) in the 2014 Republican primary (2%). With today’s developments, Farenthold will have at least five primary challengers.

CD6 open: Craig Walker filed in the increasingly crowded Republican primary for the seat being vacated by U.S. Rep. Joe Barton (R-Ennis). We were unable to identify him conclusively.

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