“Barack Obama is trying hard to make Kamala Harris seem cool,” the Wall Street Journal reports. “With raucous rallies, freewheeling podcasts and rapping Eminem lyrics, the former president is making an all-out push on behalf of the vice president. The Harris campaign is hoping some of Obama’s popularity rubs off as they try to repeat what worked for him in 2008 and 2012 while avoiding the mistakes that doomed Hillary Clinton’s bid in 2016.”