Senate Democrats scuttled a scaled-back GOP coronavirus rescue package on Thursday as the parties argued to a standstill over the size and scope of the aid, likely ending hopes for coronavirus relief before the November election. The mostly party-line vote capped weeks of wrangling that gave way to election-season political combat and name-calling over a fifth relief bill that all sides say they want but are unable to deliver. The bipartisan spirit that powered earlier aid measures is all but gone.