A federal bill to change the way Ottawa assesses major energy projects is getting a rough ride in Calgary. Representatives of Canada's biggest oil and gas companies took turns demanding major changes to Bill C-69 before a Senate committee making a Calgary stop on a cross-Canada series of hearings that started in Vancouver on Monday. Meanwhile, outside the downtown hotel where the hearing was taking place, hundreds of people chanted "Kill that Bill," and waved signs in a rally typical of those staged whenever federal politicians come to Calgary in recent months. UCP Leader Jason Kenney joined the protesters. Spokespeople for large oilsands producers Canadian Natural Resources Ltd., Suncor Energy Inc., Imperial Oil Ltd. and Cenovus Energy told the hearing they support the intent of the bill to improve the regulatory process but only if sweeping amendments proposed by the Canadian Association of Petroleum Producers are adopted. NDP Leader Rachel Notley also spoke to reporters after speaking to a senate committee about the C-48 oil tanker bill.