Sterling, Va. — Here in this lumber warehouse, the air is hot and humid, and wood dust is collecting on reporters’ jackets. But up on the dais, House Republicans look cool and calm — decked out in casual wear. Boehner dons a blue shirt sans tie. Cantor and McCarthy have their starched sleeves rolled up. Chaffetz is in jeans. Pence is in plaid. And Hensarling is in a maroon cotton shirt, looking like he’s about to hit the links or the neighbor’s barbecue.