Justin Trudeau is trying to move on after the most bruising two months of his time in office — but the damage may already be done.

Resignations have been piling up for the Canadian prime minister amid a scandal over whether he and his staff pressured the former attorney general to intervene in a legal case involving a Montreal-based construction giant. It's punished his Liberal Party in opinion polls and put a dent in Trudeau's personal brand.

Last week, Trudeau expelled two former ministers at the center of the SNC-Lavalin Group Inc. ordeal and tried to stop the bleeding. The lawmakers are viewed alternatively as dissident troublemakers or principled whistle-blowers, so the prime minister is trying to change the channel to an issue on which he feels he's an unambiguous winner: climate change.