IIRC, Lange was in NZ during the passage of the anti-nuclear legislation, but was not during the visit of the USS Buchanon. This should have been a fairly routine port visit but permission was denied due to the vessels theoretical possibility of carrying nuclear depth charges, which was the USN's policy to neither confirm nor deny.Just a note to this, I did read some years ago an article that claimed that when the anti nuke legislation was passed Lange was overseas and that the loony left had managed to alter it with out him knowing. This was in the days before PC's Emails etc. possible? I don't know how true this is.
In any case the damage was done, and the rest, as they say, was history.