The vice president headlined a rally Wednesday in suburban Vernon Hills in support of Democratic Congressman Brad Schneider, U.S. Sen. Dick Durbin and Gov. Pat Quinn. Schneider is battling Republican Bob Dold to retain his 10th District seat.
Biden told hundreds packed into a community center that if Democrats lose numbers in the House it will bring the party's progress "to a screeching halt."
President Barack Obama was in Chicago on Sunday to help Quinn in his campaign against GOP challenger Bruce Rauner. Quinn campaigned Tuesday with former President Bill Clinton.