Marie Fallon, the general manager of AR Chambers Supply in Lawrenceville, is nervous about the future of her business. The threat of tariffs has prices fluctuating and she’s worried her supply sources are at risk. …As President Donald Trump’s international trade war rages on, Pennsylvania homebuilding and construction businesses are weathering the dizzying pace of cost increases and then abrupt pauses in tariffs as they try to ensure that long-term projects are completed. Pennsylvania is highly dependent on foreign countries for construction materials, with 63% of the state’s wood imports, 66% of its iron and steel, and 68% of its aluminum coming from Canada and Brazil. …Despite the whiplash changes, some in the industry see the new tariffs as good for the long-term outlook. Hodgkiss Lumber owner Jon Hodgkiss sees Trump’s tariffs as simply a temporary negotiating tactic that will give the US better trade deals.