The U.S. decision to launch a slew of new investigations into key trading partners has raised eyebrows among analysts, who question both the timing and objectives of the probes. The investigations , targeting China, Mexico, the EU and more than a dozen other economies, are being carried out under Section 301 of the Trade Act of 1974 . Here's CNBC's brief guide to Section 301s — what they are, why the White House has resorted to using them, and what President Donald Trump's administration hopes

Tag-uri: Donald Trump