Mueller report stokes political rift. Could it inspire some unity too?

What happens now to America’s divisions? In the short run they may well get worse. Sunday’s release of special counsel Robert Mueller’s main conclusions, as summarized by Attorney General William Barr, could widen the gulf of suspicion and misunderstanding between the nation’s polarized political factions.

Republicans are triumphant that the threat of a conspiracy indictment for President Donald Trump or his family members or associates has evaporated. Some are in no mood for forbearance and are urging the GOP leadership to push turnabout investigations into the alleged Democratic origins of...