WASHINGTON — A few days ago, former President Bill Clinton identified a constitutional escape hatch should President Obama and Congress fail to come to terms on a deficit reduction plan before the government hits its borrowing ceiling.

He pointed to an obscure provision in the 14th Amendment, saying he would unilaterally invoke it “without hesitation” to raise the debt ceiling, “and force the courts to stop me.”

On Friday, Mr. Obama rejected the idea, though not in categorical terms.

“I have talked to my lawyers,” Mr. Obama said. “They are not persuaded that that is a winning argument.”

Adding another element of uncertainty, and possible court battles, to the debate do not seem to appeal to the White House. And it is, in any event, not clear that the nation’s creditors would continue to lend money to the United States were the president to take unilateral action.