ACT leader, David Seymour says his party will consider a confidence-only deal if National refuses to co-operate during post-election negotiations.
David Seymour warns a confidence-only deal would be difficult for National which could need ACT's support for all government spending - or "supply" - decisions on a case-by-case basis - including the Budget.
Otago University Professor of Public Law Andrew Geddis spoke to Corin Dann.
