For the younger folks: Kerry got some seriously badass medals for his military service in Vietnam. People who had been on the same boat as he did, but at a different time, worked with the Republican party to claim that he hadn’t really done what he did. The press ate this up, and distributed it widely, costing him public support and likely the election.
And please not, this is literally the same person trying to swift boat here - Chris LaCivita, now the co-manager of the Trump campaign.
Grifters all the way down the trump camp