WASHINGTON — President Donald Trump is taking a blowtorch to the rules that have governed world trade for decades. The “reciprocal’’ tariffs that he announced Thursday are likely to create chaos for global businesses and conflict with America’s allies and adversaries alike.

President Donald Trump on Thursday moved to tear up decades-old low U.S. tariff rates, raising them to match those of other countries and counteract other barriers to American goods to try to shrink a U.

President Trump initiated a major shift in U.S. trade policy by ordering higher tariffs to match those of other nations. Aimed at tackling a significant trade deficit, this directive could alter trade relations with major partners,