WASHINGTON  As he often does, President Obama took the opportunity in a bill-signing ceremony last month to remind Congress “to do what we were actually sent here to do  and that is to stand up to the special interests, and stand up for the American people.”

But Mr. Obama did not mention that the measure he was signing, the Helping Families Save Their Homes Act, was missing its centerpiece: a change in bankruptcy law he once championed that would have given judges the power to lower the amount owed on a home loan.

It had been stripped out three weeks earlier in a showdown between Senate Democrats and the nation’s banks, including many that are getting big government bailouts.

As Congressional Democrats and the White House crow about multiple victories over the financial industry, including new rules for credit card issuers, banks are quietly savoring an even bigger victory of their own.