On Tuesday, House Minority Leader Kevin McCarthy announced his opposition to a bill to form a bipartisan commission that would investigate Jan. 6. The events of that day continue to haunt the GOP, but McCarthy’s refusal to support an examination hurts the party much more than helps it.

Most of his objection has to do with a desire to see other forms of political violence investigated as well. To be sure, that is a worthy goal, but an attack on the U.S. Capitol is different.