Polling indicates the coronavirus pandemic could make it harder for former vice president Joe Biden to beat President Trump. But Biden’s team is arguing the opposite: That the virus and subsequent economic landslide highlight precisely why Americans should elect the former vice president in November. “He’s battle-tested,” a Biden campaign policy adviser told me in an interview yesterday, noting that Biden became vice president amid the 2008 financial crisis and was there as the U.S. responded to the H1N1 swine flu in 2009 and the Ebola outbreak in Africa in 2014.