Trade groups representing home builders and real estate agents are warning Congress that a decrease in conforming loan limits will result in higher interest rates for borrowers and other less favorable loan terms. However, the housing advocates face a tough battle in extending temporarily elevated conforming loan limits. Without action from Congress, the high-cost loan limit for agency mortgages and the FHA will fall from $729,750 to $625,500 beginning Oct. 1. Some 5.25 million owner-occupied homes will no longer qualify...