Well, I looked it up. It was in Ohio, and that's what he said. The precise quote was:

“Now, if I don’t get elected, it’s going to be a blood bath for the whole — that’s going to be the least of it. It’s going to be a blood bath for the country.”

The headlines seem reasonably accurate based on that direct quote. The entire quote would be a cumbersome headline. Looking at my sources, and reading beyond the headlines, it was -mostly- in the context of the auto industry, though apparently the "that will be the least of it" addition implies a larger scope than just autos. But we can't really know what he meant by that because he didn't elaborate (at least not that I could find in a few minutes of googling).

How would you have phrased the headline?

From what I gather, the Biden campaign did hype it up completely out of context, which really wasn't cool. Makes them look no better than OANN. They should be above that sort of deceit. Especially when it will be easily caught by the media. So a ding against the campaign, but they aren't new outlets.