Trudeau's top adviser resigns as SNC-Lavalin scandal heats up

The focus is intensifying on the Prime Minister's Office after another high-profile resignation over in the SNC-Lavalin affair. Gerald Butts, Justin Trudeau's principal secretary, has stepped down over allegations he tried to pressure former former Attorney-General Jody Wilson-Raybould in the case, something he vehemently denies.