While the trips are labelled as provincial visits and described as a way for our leaders to keep in touch with ordinary New Zealanders, there is another item on the agenda — vote-gathering.
It becomes more obvious as each election nears, as any seat one party thinks it might snatch from another suddenly becomes a political tourism hot spot.
There are plenty of tourist attractions in Invercargill — but when Prime Minister Jacinda Ardern visited on Thursday she was not checking out the Bill Richardson Transport World or walking the Southern Scenic Route.
Instead, she visited the city’s two cathedrals of industry, the Tiwai Point aluminium smelter and the Alliance Group’s Lorneville facility.
Labour still wants to be the party of the workers, and there are plenty of workers in both places — around 3000 people all told.
Not that all of them will be New Zealanders, though — a point made by Alliance Group chairman Murray Taggart when he thanked the Government for helping the co-operative hire foreign workers for the plant.
The Government may be creating jobs — and the Prime Minister was keen to point out the new positions created at the aluminium smelter — but is it creating jobs for the good folk of Invercargill?
Phrases like "high-tech" "innovative" and "carbon-free" are all very well, but does that make a real difference in the city?
Last week, the Ministry of Health released a report on its Healthy Families initiative — a 10-centre health promotion strategy which includes Invercargill.
Four years on — in what, to be fair, is expected to be a long-term programme — Invercargill showed no improvement in any of the health categories targeted by the programme.
The Prime Minister’s visit played well for her immediate message of an innovative, environmentally friendly economy — their low carbon footprint was emphasised at each large facility.
But long term, do Labour strategists think they could swing some votes their way in Invercargill come the 2020 election?
Incumbent MP, National’s Sarah Dowie, does look to have a firm hold on the seat — she won more than half the votes cast in 2017.
Boundary changes suggest the days when Labour could win Invercargill — Mark Peck held the seat for Labour from 1993-2005 — might be a thing of the past.
You would expect they would face off again in Invercargill in 2020.
Both women have the profile a Parliamentary seat provides, and each has an active social media presence.
An extremely unscientific study of the audience at Thursday’s events showed almost everybody recognised Ms Dowie, but fewer knew who Dr Craig was — although that might change with a few more photographs of her standing beside Jacinda Ardern at Invercargill landmarks.
On the 2017 numbers it seems fanciful to suggest Labour has a serious shot at taking Invercargill from National — but if Labour suspects there is a decent chance of running up its vote, as it did last election, do not be surprised if Ms Ardern schedules in a few more trips to the deep South.
As I was about to say ...
We will have to wait with bated breath for Dunedin South MP Clare Curran’s contribution to the debate on the Accident Compensation Amendment Bill.
Ms Curran got as far as "Thank you, Madam Assistant Speaker. I rise," before the House was adjourned for the week.
A busy week for ...
Dunedin North MP David Clark and Dunedin-based National list MP Michael Woodhouse, who continued their duel over the Medical Cannabis Bill with several speeches. The committee stages on this Bill have been lengthy, but there is no doubt the issue is being fully explored.
A quiet week for ...
The South’s National MPs, who joined their colleagues in Wednesday’s walkout from Question Time, as the party protested the rulings of Speaker Trevor Mallard. It got some headlines but will likely be a futile exercise — the Speaker is the referee of the House of Representatives, and as a former rugby referee Mr Woodhouse would well know you do not get anywhere arguing with the ref.