The planned auction for Columbus Castings on Tuesday has been delayed. The south side foundry was scheduled for an auction in the morning, and the other assets owned by parent company Constellation Enterprises were scheduled for the afternoon. Spokeswoman Jennifer Mercer said only the auction for the non-Columbus assets was held. "As for the Columbus auction, it has yet to be scheduled," she said in an email. Delays aren't unusual for complex bankruptcy filings. The plant's owner filed for...