In FIFA terms, the Democratic Party stands before a wide-open goal. There is no daylight between an unpopular President Donald Trump and his reflexively loyalist Republicans. Instead of putting the ball into the back of the net, however, Democrats are squabbling in front of the goal. Trump’s single-mindedness is mirrored by a fractious opposition.The odds are still that Democrats will regain the House of Representatives in November – midterms being essentially a plebiscite on the sitting president. Yet, Democrats are devising ways to push the Senate beyond their reach.The party is split between a radicalised younger vote, which is increasingly...