According to an NPR story yesterday, as much as 25% of Hillary supporters would consider voting for McCain if Obama is the nominee. If Hillary is the nominee, about 10% of Obama supporters would vote for McCain, and many more would simply stay home on election day. The cost of a divided party is clear. While either candidate can win in November — the issues the country cares about are perfectly in line with the Democratic agenda — it would be a much easier task to have the whole party solidly behind both candidates. The only way to do that is to put both candidates on the ticket.