Investing.com - US markets will be closed on Monday for the Labor Day holiday.Congress returns from recess on Tuesday with a tight timetable to tackle the looming deadlock over the US debt ceiling.Market watchers will be eyeing speeches by Federal Reserve officials as they try to gauge when the central bank will raise rates again.Investors will look to Thursday's ECB meeting to see if Mario Draghi will address the recent euro rally or a timetable for tapering.North Korea in focus after nuclear test escalates geopolitcal tensions