Chris Willman Music Writer“Pass the Mic,” meet “Pass the Presidency.” DJ Cassidy has the distinction of being the only musical participant in Wednesday’s inaugural festivities to be featured as part of two separate events, for which he’s produced a pair of segments of his popular “Pass the Mic” series in honor of Joe Biden and Kamala Harris getting their own mic-pass.The first appearance, in the virtual inaugural parade in the afternoon, will be focused on the classics.