The debt-ceiling crisis is coming at the 'worst possible time,' says Chicago Fed president

• The debt-ceiling crisis is adding stress at an already difficult period, Austan Goolsbee said.
• "This whole ... argument about the debt ceiling comes at the worst possible time — worst possible time."
• Even a last-second deal could cause doubt in Treasurys, he told Yahoo Finance.

The debt-ceiling impasse on Capitol Hill is adding uncertainty to an already troublesome set of economic conditions, Chicago Federal Reserve President Austan Goolsbee said.

"This whole ... argument about the debt ceiling comes at the worst possible time — worst possible time," he told Yahoo Finance on Monday.