Group 1 - The Trump administration is set to announce new trade investigations aimed at replacing recently ruled illegal reciprocal tariffs [1][2] - These investigations will be conducted under Section 301 of the Trade Act of 1974, which allows the president to impose tariffs on imports from nations engaging in unfair trade practices [2] - The Supreme Court ruled that Trump did not have the authority to impose such duties under the International Emergency Economic Powers Act, impacting the legality of previous tariffs [3] Group 2 - The expected Section 301 probes could target various countries, although specific nations have not been disclosed [2] - The new tariffs are intended to replace those imposed last year without congressional authorization, indicating a shift in trade policy [2]