Ontario's construction industry is facing challenges due to proposed U.S. tariffs on Canadian goods and potential retaliatory measures. These tariffs could increase material costs, disrupt supply chains, and lead to delays and budget overruns. Contractors are advised to revise contracts to include change-in-law and price escalation clauses, qualify bids to account for tariff impacts, diversify supply chains by sourcing locally, and engage in strategic procurement. Building strong relationships and investing in innovation will be crucial for navigating these uncertainties.