Crist and his 18 possible running mates

Too soon?— Rep. Charlie Crist has a Democratic primary to win first, but his campaign is already starting to get ready for the November election — and that includes picking a running mate.

First round— The Crist campaign has come up with a long list of 18 Democrats to consider as possible lieutenant governor nominees that includes a few potential surprising candidates, including Manny Diaz, the current chair of the Florida Democratic Party.

Next step — The plan, as told to Playbook by a person close to the campaign, is to use the...