Seymour wouldn't say whether he thought it was a strategic blunder by National to rule NZ First leader Winston Peters in, and then threaten a second election.
Since then Act has been trending down, while NZ First as been trending up.
Nor does Seymour think he missed an opportunity to seize the antivax vote which, in online forums, had been tossing up between a number of parties including Act and NZ First, but now appears to be behind the latter.
"What Act has done throughout this discussion, going as far back as September and October 2021, is put out rational policy," said Seymour. "Vax or test, letting organisations make their own policy rather than blanket government-wide mandates, letting doctors make exemptions [rather than the Ministry of Health].
"People that have that view are very supportive of Act. People that are more into speculating about some of the more radical and interesting theories about that period and about vaccination, those aren't really people that Act can get because you need to be prepared to entertain a level of debate that I'm just not in politics for."
He had no regrets about Act's campaign.
"Sometimes when you're the one pointing out that the Government's out of money and the Treaty needs an honest conversation, that doesn't thrill people, but it is also the kind of honesty that New Zealand requires. So, no, we wouldn't change anything."