The actual title in the linked media is: "Trump pausing tariffs on some Canadian goods until April 2". So, media did not lied nor committed error by omission. To be fair, OP did not mentioned or accused media.
The hacker news title is "Trump says he is pausing tariffs on Canadian ...". So, either Trump lies or the HN title lies.
I'm just trying to understand the intent behind this: "Any suggestion that tariffs are being paused is a complete lie." I read that as blaming the media for not explaining that this is partial?