The Watergate break in was looking for a connection between Daniel Ellsberg, the DNC and the Communist Party.
Daniel Ellsberg was working for Los Alamos labs on advanced nuclear weapon design and there were indications he was going to defect to the USSR with the secrets.
The FBI had already started tracking Ellsberg.
Ellsberg had access to the W76 warhead design, Fogbank, linear compression and the RV ablative coating which all made sub launched MIRV possible.
Fortunately, Fogbank and the ablative coatings are still secret.
Or to find Dean’s wife’s hooker connections