Clinton should not worry about pundits who like to say that this election will feature the two most unpopular nominees in the history of polling. A good president need not be popular, and Trump has no solid plan to emerge from his abyss of negative attributes. Clinton is polling at her lowest, thanks to a bruising primary. She will become less disliked as these numbers stabilize.
But she should worry if she lets these concerns get in the way of her making the race a big one. By that I mean: every tactic, proposal, policy maneuver, vector, change — all should be on the table. She must treat Donald Trump as if he were an imminent threat to the country. She cannot run the race as a frontrunner. She cannot rest on mathematics of the electoral map, which are broadly in her favor, but which could flip on a dime. She cannot be cautious about losing what she’s built already. Trump has nowhere to go but up; his ability to master the media frustrates her campaign, but instead of complaining about it, they must figure out how to beat it back.