WASHINGTON, Aug 6 (Reuters) - President Donald Trump said the United States will impose a tariff of about 100% on imports of semiconductors but offered up a big exemption - it will not apply to companies that are manufacturing in the U.S. or have committed to do so.

President Donald Trump says he's imposing a 100% tariff on computer chips— a move that raises the specter of higher prices for electronics, autos, household appliances and other essential goods that depend on the processors.

President Trump said companies will pay double for computer chips unless they build in the U.S. Apple secured an exemption and promised an extra $100 billion of U.S. investment.