Lucas Jackson/Reuters US stocks slid on Thursday as investors weighed better-than-expected weekly jobless claims against continued stimulus negotiations between House Speaker Nancy Pelosi and Treasury Secretary Steve Mnuchin.Pelosi and Mnuchin will continue talks on Thursday, though Senate Republicans have shown little signs of support for the potential bipartisan deal.New US weekly jobless claims totaled 787,000 last week, coming in below the median economist estimate of 870,000 compiled by Bloomberg.