Home loans to lower-income Americans are dwindling as Washington regulators and major banks continue to haggle over who pays when riskier mortgages go bad.

Federal Housing Administration loans, given to borrowers with weaker credit scores and requiring small down payments, plummeted 19 percent in the nine months ending June 30 compared with a year earlier. A meeting on Wednesday at the White House between government officials and banking executives ended without an announcement of any breakthroughs on the dispute.