A consensus has formed about this presidential election: it is Joe Biden’s to lose. As long as his vice-presidential nomination doesn’t backfire, or he does not spectacularly bungle the debates, the soon-to-be-confirmed Democratic nominee will be in the White House by the end of January. Just look at the polls.Well, do look at the polls, and you’ll notice that Biden is losing ground. He’s still ahead, and comfortably, but the race narrowed in July, just as the media started to discuss a Biden presidency as if it were a fait accompli. Trump’s job approval rating is rising slightly, too, from 41 percent on June 29 to almost 44 percent today, according to the RealClearPolitics tracker.