Is Equifax the hack that breaks deadlock on a federal data-breach law?

Two powerful GOP congressional committee chairmen have indicated they will pursue long-stalled data security and breach notification legislation -- also a priority for Hill Democrats -- but other key Republicans remain skeptical and the odds of enacting a law during the current Congress still appear to be long.

The White House has offered general support for data-breach legislation, but its specific demands -- and the priority it would put on a legislative push -- remain to be seen.

White House...