The Democratic field is shrinking. But the number of candidates on the debate stage is about to grow.

At least 12 presidential hopefuls are expected to appear together on a single night at next month’s televised debate in Ohio, Democratic officials said on Friday, contrary to recent speculation that the event might be spread across two days to accommodate the large lineup.

Squeezing a dozen voluble politicians onto one stage could prove unwieldy, with plenty of opportunities for cross talk as lower-polling candidates hunt for what may be their last chance at a national breakout moment. Moderators from CNN and The New York Times, the debate’s co-sponsors, will be tasked with keeping order.