WASHINGTON (Reuters) - The U.S. State Department on Thursday played down expectations for talks on how Washington and Tehran might resume compliance with the 2015 Iran nuclear deal and said the U.S. envoy was likely to return home as the talks break for the weekend. While echoing descriptions of the talks as “constructive,” State Department spokesman Ned Price told reporters “we would also, however, hasten to not allow expectations to outpace where we are.”