TransCanada recently abandoned plans to lower tolls on its cross-country gas pipeline to eastern Canada, which industry analysts believe creates an opening for United States gas producers to expand into Canada’s market. In the absence of additional western-Canadian gas shipments eastward, producers especially in Pennsylvania’s Marcellus Basin could shift supplies to Canadian population centers. Antero Resources, Rice Energy, and Gulfport Energy, which supply Marcellus gas to the US Midwest, could benefit most from this opportunity, said analysts Timm Schneider and Stephen Richardson at Evercore ISI. Proposed US-to-Canada pipeline projects could also benefit, GMP FirstEnergy analyst Martin King said.