Comcast is the nation's largest cable TV operator and residential Internet service provider. The Comcast Center has been closed to the public, preventing access to a large food court that usually draws a large lunchtime crowd. The Black Eyed Peas are listed as headliners for a Rock The Vote concert at the Fillmore Philadelphia, while Fergie is headlining a concert at the Electric Factory for the Creative Coalition, a social and public advocacy organization for entertainers. The Grammy-winning rap group, which also includes members Will.i.am, apl.de.ap and Taboo, had multiplatinum hits with songs like "Boom Boom Pow" and "I Gotta Feeling." Bernie Sanders loyalists believe the Democratic Party could rupture over Hillary Clinton's nomination after a volatile night that saw Sanders delegates leave the party's national convention in Philadelphia to stage a sit-in at a media tent. College student Cory James of Flint, Michigan, says a fundamental shift in American politics could be underway if the party splits.