"No they won't. You're entirely wrong.
"It's this simple right? Winston Peters went out there and promised you, your grandmother and everyone else 50 things. He hasn't delivered a single one of them."
Listen below:
Mackay took umbrage with the "grey hair" reference and accused the Opposition leader of being "ageist".
An undeterred Bridges did not back down - he actually decided to double down.
"I just think you're apologetic every single week ... you'd think he was the pope the way you talk about him".
Overall, Bridges said he found the exchange with Mackay cathartic and perhaps a new way forward for further discussions in 2020.
"I've had a good go at you today. It feels quite good. I might have to continue the way I've started this year.
He then suggested Mackay's interest in Peters may come from Prime Minister Jacinda Ardern's supposed reluctance to talk to The Country host.
"Maybe that's why you love each other so much ... you and Winnie."
The Country host had the last word though and insisted his interest in Peters was for the good of Kiwi farmers, not his own gratification.
"All I want Simon Bridges is for the next Government not to be a Labour/Greens coalition and I'm saying that simply on behalf of the farmers of this country."
Also in today's interview: Bridges talked about NZ First party donations. He also disagreed with RNZ's proposed youth network, because he thinks young people are into Spotify and commercial radio and apologised to Southland for being unable to attend Southern Field Days in Waimumu today.