America is not above using threats to get countries to support their position. In the case of NZ they are veiled threats but also clear ones.
Charles Swindells, the US Ambassador to NZ speaking last year.
http://www.tln.co.nz/speeches-detail.asp?speechID=78
"Another tangible sign of the strong bonds between our countries was seen last March, when Prime Minister Helen Clark visited Washington and held meetings with President George Bush and senior members of his administration. I sat-in on all of those meetings, and I can tell you that they were constructive, positive and forward-looking. I think both the President and the Prime Minister recognized they could work together on many world issues and concerns. The trip went well, and I have spoken with the President about the importance of a visit to this region.
Being good friends, of course, means we have the confidence to be honest with each other. That means recognizing, with respect, those areas where we differ.
The ban on nuclear-propelled ship visits is one such area, and I raise this because it has recently appeared in the press in various incarnations.
Some people may have thought the issue had gone away. It has not.
Some may now think Washington has resurrected it in a bid to alter New Zealand policy.
It has not.
We respect New Zealand’s right to determine its own security policies. We have never made the nuclear issue a test of our friendship or our cooperation. But at the same time, New Zealand’s anti nuclear policy does place limits on the depth and breadth of our relationship.
Friends and allies are not the same. Being an ally places responsibilities and burdens on both partners, but it also carries with it access and benefits not available to non-allies.
I would think most people would see this as simple common sense, but perhaps
it bears repeating… given the way this issue is so often mis-characterized. Lately, though, it does seem there is more discussion about the issue appearing in the press, and I think this is a healthy
development. "
and again
"I raised the nuclear issue earlier. I should probably mention it once again because of the way it has been associated by some people with the prospect of bilateral trade talks.
The nuclear issue is one element in the strategic
and security relationship between the United States and New Zealand.
This relationship is one of the factors considered when deciding whether or not to commit limited negotiating resources and political capital on a new bilateral trade agreement. But I should stress that there are many other factors, such as economic impact, domestic views and political reactions,
which are thrown into the mix.
Again, this should not be a startling revelation to anyone. Nations will always calculate their interests, looking at all factors, before proceeding with a major decision such as entering into negotiations on a binding, bilateral agreement. "
NZ has always been a friend to the US (and an ally till our nuclear stance was taken) and we have paticipated in all the US’s military involvements, so the language used was not as strong as Chicacs but in IMHO the meaning is the same, shape up or we won’t let you play with us.