Jamie Dimon, who has criticized regulators in the past, is drawing new battle lines with Washington over mortgages insured by the Federal Housing Administration.

The JPMorgan Chase chief executive officer, whose bank recently paid more than $600 million in federal fines for originating $200 million in flawed FHA loans, wants clearer rules spelling out when the government will demand these triple penalties. Without that, Dimon suggested on an earnings call last week, he might stop originating FHA mortgages altogether.