The last player chosen each spring in the National Football League draft is referred to as Mr. Irrelevant for his small chance of making a team roster in the fall. An analogy in politics is House Minority Leader, so congratulations to Kevin McCarthy on his selection Wednesday to lead House Republicans in 2019. He’s Rep. Irrelevant.

The former small business owner from southern California defeated Ohio Rep. Jim Jordan, 159-43, in the shrunken GOP conference. The lopsided vote was a surprise given that the GOP lost its majority...