NZ First leader Winston Peters is the latest politician to voice concerns about the timing of the royal visit, saying the "misuse of the royal family'' was "disdainful''.
Earlier today, Labour leader David Cunliffe took a dig at the Prime Minister John Key over the level of his involvement in the royal tour and said any visit to the White House in an election year would be "pre-election PR from the Prime Minister."
Mr Cunliffe said Labour welcomed the royals and did not want to play politics with the visit. However, he said such visits should be as "even handed as possible between the Government and Opposition, and also that it is well enough spaced from the election."
His comments were backed by Mr Peters, who said it was "seriously unfortunate" that the visit should happen in an election year.
"We don't want to make a controversy of it, but [Mr Key] could very quickly slide into an abuse of the institution and I hope that doesn't happen.''